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Schadauer K, Astrup R, Breidenbach J, Fridman J, Gräber S, Köhl M, Korhonen KT, Johannsen VK, Morneau F, Päivinen R, Riedel T. Access to exact National Forest Inventory plot locations must be carefully evaluated. New Phytol 2024; 242:347-350. [PMID: 38359875 DOI: 10.1111/nph.19564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 01/17/2024] [Indexed: 02/17/2024]
Affiliation(s)
| | - Rasmus Astrup
- Norwegian Institute for Bioeconomy Research, Ås, 1433, Norway
| | | | - Jonas Fridman
- Swedish University of Agricultural Sciences, Umeå, 901 83, Sweden
| | - Stephan Gräber
- Austrian Research Centre for Forests, Vienna, 1131, Austria
| | | | - Kari T Korhonen
- Natural Resources Institute Finland, Joensuu, 80100, Finland
| | | | - Francois Morneau
- Institut national de l'information géographique et forestière, Nogent sur Vernisson, 45290, France
| | | | - Thomas Riedel
- Thünen-Institute of Forest Ecosystems, Eberswalde, 16225, Germany
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Schlapbach LJ, Goertz S, Hagenbuch N, Aubert B, Papis S, Giannoni E, Posfay-Barbe KM, Stocker M, Heininger U, Bernhard-Stirnemann S, Niederer-Loher A, Kahlert CR, Natalucci G, Relly C, Riedel T, Aebi C, Berger C, Agyeman PKA. Organ Dysfunction in Children With Blood Culture-Proven Sepsis: Comparative Performance of Four Scores in a National Cohort Study. Pediatr Crit Care Med 2024; 25:e117-e128. [PMID: 37878412 PMCID: PMC10904004 DOI: 10.1097/pcc.0000000000003388] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
OBJECTIVES Previous studies applying Sepsis-3 criteria to children were based on retrospective analyses of PICU cohorts. We aimed to compare organ dysfunction criteria in children with blood culture-proven sepsis, including emergency department, PICU, and ward patients, and to assess relevance of organ dysfunctions for mortality prediction. DESIGN We have carried out a nonprespecified, secondary analysis of a prospective dataset collected from September 2011 to December 2015. SETTING Emergency departments, wards, and PICUs in 10 tertiary children's hospitals in Switzerland. PATIENTS Children younger than 17 years old with blood culture-proven sepsis. We excluded preterm infants and term infants younger than 7 days old. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS We compared the 2005 International Pediatric Sepsis Consensus Conference (IPSCC), Pediatric Logistic Organ Dysfunction-2 (PELOD-2), pediatric Sequential Organ Failure Assessment (pSOFA), and Pediatric Organ Dysfunction Information Update Mandate (PODIUM) scores, measured at blood culture sampling, to predict 30-day mortality. We analyzed 877 sepsis episodes in 807 children, with a 30-day mortality of 4.3%. Percentage with organ dysfunction ranged from 32.7% (IPSCC) to 55.3% (pSOFA). In adjusted analyses, the accuracy for identification of 30-day mortality was area under the curve (AUC) 0.87 (95% CI, 0.82-0.92) for IPSCC, 0.83 (0.76-0.89) for PELOD-2, 0.85 (0.78-0.92) for pSOFA, and 0.85 (0.78-0.91) for PODIUM. When restricting scores to neurologic, respiratory, and cardiovascular dysfunction, the adjusted AUC was 0.89 (0.84-0.94) for IPSCC, 0.85 (0.79-0.91) for PELOD-2, 0.87 (0.81-0.93) for pSOFA, and 0.88 (0.83-0.93) for PODIUM. CONCLUSIONS IPSCC, PELOD-2, pSOFA, and PODIUM performed similarly to predict 30-day mortality. Simplified scores restricted to neurologic, respiratory, and cardiovascular dysfunction yielded comparable performance.
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Affiliation(s)
- Luregn J Schlapbach
- Department of Intensive Care and Neonatology, and Children`s Research Center, University Children`s Hospital Zurich, Zurich, Switzerland
- Child Health Research Centre, University of Queensland, Brisbane, QLD, Australia
| | - Sabrina Goertz
- Division of Infectious Diseases, and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Niels Hagenbuch
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Blandine Aubert
- Clinic of Neonatology, Department Mother-Woman-Child, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Sebastien Papis
- Pediatric Infectious Diseases Unit, Department of Woman, Child and Adolescent, Children's Hospital of Geneva, University Hospitals of Geneva and Faculty of Medicine, Geneva, Switzerland
| | - Eric Giannoni
- Clinic of Neonatology, Department Mother-Woman-Child, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Klara M Posfay-Barbe
- Pediatric Infectious Diseases Unit, Department of Woman, Child and Adolescent, Children's Hospital of Geneva, University Hospitals of Geneva and Faculty of Medicine, Geneva, Switzerland
| | | | - Ulrich Heininger
- Infectious Diseases and Vaccinology, University Children's Hospital Basel, Basel, Switzerland
| | | | | | | | | | - Christa Relly
- Division of Infectious Diseases, and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Thomas Riedel
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of Pediatrics, Cantonal Hospital Graubuenden, Chur, Switzerland
| | - Christoph Aebi
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Christoph Berger
- Division of Infectious Diseases, and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Philipp K A Agyeman
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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3
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Riva T, Goerge S, Fuchs A, Greif R, Huber M, Lusardi AC, Riedel T, Ulmer FF, Disma N. Emergency front-of-neck access in infants: A pragmatic crossover randomized control trial comparing two approaches on a simulated rabbit model. Paediatr Anaesth 2024; 34:225-234. [PMID: 37950428 DOI: 10.1111/pan.14796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/20/2023] [Accepted: 10/25/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND Rapid-sequence tracheotomy and scalpel-bougie tracheotomy are two published approaches for establishing emergency front-of-neck access in infants. It is unknown whether there is a difference in performance times and success rates between the two approaches. AIMS The aim of this cross-over randomized control trial study was to investigate whether the two approaches were equivalent for establishing tracheal access in rabbit cadavers. The underlying hypothesis was that the time to achieve the tracheal access is the same with both techniques. METHODS Between May and September 2022, thirty physicians (pediatric anesthesiologists and intensivists) were randomized to perform front-of-neck access using one and then the other technique: rapid-sequence tracheotomy and scalpel-bougie tracheotomy. After watching training videos, each technique was practiced four times followed by a final tracheotomy during which study measurements were obtained. Based on existing data, an equivalence margin was set at ∆ = ±10 s for the duration of the procedure. The primary outcome was defined as the duration until tracheal tube placement was achieved successfully. Secondary outcomes included success rate, structural injuries, and subjective participant self-evaluation. RESULTS The median duration of the scalpel-bougie tracheotomy was 48 s (95% CI: 37-57), while the duration of the rapid-sequence tracheotomy was 59 s (95% CI: 49-66, p = .07). The difference in the median duration between the two approaches was 11 s (95% CI: -4.9 to 29). The overall success rate was 93.3% (95% CI: 83.8%-98.2%). The scalpel-bougie tracheotomy resulted in significantly fewer damaged tracheal rings and was preferred among participants. CONCLUSIONS The scalpel-bougie tracheotomy was slightly faster than the rapid-sequence tracheotomy and favored by participants, with fewer tracheal injuries. Therefore, we propose the scalpel-bougie tracheostomy as a rescue approach favoring the similarity to the adult approach for small children. The use of a comparable equipment kit for both children and adults facilitates standardization, performance, and logistics. TRIAL REGISTRATION ClinicalTrials.gov identifier: NCT05499273.
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Affiliation(s)
- Thomas Riva
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Simon Goerge
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Alexander Fuchs
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Unit for Research in Anaesthesia, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Robert Greif
- School of Medicine, Sigmund Freud University Vienna, Vienna, Austria
- University of Bern, Bern, Switzerland
| | - Markus Huber
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Andrea C Lusardi
- Unit for Research in Anaesthesia, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Thomas Riedel
- Division of Pediatric Intensive Care Medicine, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Francis F Ulmer
- Division of Pediatric Intensive Care Medicine, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Nicola Disma
- Unit for Research in Anaesthesia, IRCCS Istituto Giannina Gaslini, Genoa, Italy
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4
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Kaiser HA, Bauer T, Riva T, Greif R, Riedel T, Theiler L, Nabecker S. Carbon dioxide and cardiac output as major contributors to cerebral oxygenation during apnoeic oxygenation. Sci Rep 2024; 14:3617. [PMID: 38351038 PMCID: PMC10864331 DOI: 10.1038/s41598-023-49238-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 12/06/2023] [Indexed: 02/16/2024] Open
Abstract
Apnoeic oxygenation has experienced a resurgence in interest in critical care and perioperative medicine. However, its effect on cerebral oxygenation and factors influencing it, have not yet been investigated in detail. By using near-infrared spectroscopy, we intended to provide further evidence for the safety of apnoeic oxygenation and to increase our understanding of the association between cerebral perfusion, haemodynamic, respiratory and demographic factors. In this secondary analysis of a prospective randomized controlled noninferiority trial, we recruited 125 patients, who underwent surgery under general anaesthesia with neuromuscular blockade. Arterial blood samples were taken every 2 min for a total of 15 min under apnoeic oxygenation with 100% oxygen. Near-infrared spectroscopy and cardiac output were continuously measured. Statistical analysis was performed using uni- and multivariable statistics. Ninety-one complete data sets were analysed. In six patients the SpO2 fell below 92% (predefined study termination criterion). The significant average increase of cerebral oxygenation was 0.5%/min and 2.1 mmHg/min for the arterial pressure of carbon dioxide (paCO2). The median cardiac output increased significantly from 5.0 l/min (IQR 4.5-6.0) to 6.5 l/min (IQR 5.7-7.5). The most significant effect on cerebral oxygenation was exhibited by the variable paCO2 and non-specific patient factors, followed by cardiac output and paO2. Apnoeic oxygenation proves to have a high safety profile while significantly increasing cerebral oxygenation, paCO2 and cardiac output. In reverse, NIRS might act as a reliable clinical surrogate of paCO2 and cardiac output during stable arterial oxygenation.
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Grants
- no ID The study was supported by a departmental research grant of the Department of Anaesthesiology and Pain Medicine, University Hospital of Bern, Bern, Switzerland.
- no ID The study was supported by a departmental research grant of the Department of Anaesthesiology and Pain Medicine, University Hospital of Bern, Bern, Switzerland.
- no ID The study was supported by a departmental research grant of the Department of Anaesthesiology and Pain Medicine, University Hospital of Bern, Bern, Switzerland.
- no ID The study was supported by a departmental research grant of the Department of Anaesthesiology and Pain Medicine, University Hospital of Bern, Bern, Switzerland.
- no ID The study was supported by a departmental research grant of the Department of Anaesthesiology and Pain Medicine, University Hospital of Bern, Bern, Switzerland.
- no ID The study was supported by a departmental research grant of the Department of Anaesthesiology and Pain Medicine, University Hospital of Bern, Bern, Switzerland.
- no ID The study was supported by a departmental research grant of the Department of Anaesthesiology and Pain Medicine, University Hospital of Bern, Bern, Switzerland.
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Affiliation(s)
- Heiko Andreas Kaiser
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Thomas Bauer
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Thomas Riva
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Unit for Research and Innovation, Department of Paediatric Anaesthesia, Istituto Giannina Gaslini, Genova, Italy
| | - Robert Greif
- University of Bern, Bern, Switzerland
- School of Medicine, Sigmund Freud University Vienna, Vienna, Austria
| | - Thomas Riedel
- Department of Paediatrics, Cantonal Hospital Graubünden, Chur, Switzerland
- Division of Respiratory Medicine, Department of Paediatrics, Inselspital, University Children's Hospital, University of Bern, Bern, Switzerland
| | - Lorenz Theiler
- Department of Anaesthesia, Cantonal Hospital Aarau, Aarau, Switzerland
| | - Sabine Nabecker
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
- Department of Anaesthesiology and Pain Management, Sinai Health System, University of Toronto, Toronto, Canada.
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5
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Kopf A, Bunk B, Riedel T, Schröttner P. The zoonotic pathogen Wohlfahrtiimonas chitiniclastica - current findings from a clinical and genomic perspective. BMC Microbiol 2024; 24:3. [PMID: 38172653 PMCID: PMC10763324 DOI: 10.1186/s12866-023-03139-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 11/29/2023] [Indexed: 01/05/2024] Open
Abstract
The zoonotic pathogen Wohlfahrtiimonas chitiniclastica can cause several diseases in humans, including sepsis and bacteremia. Although the pathogenesis is not fully understood, the bacterium is thought to enter traumatic skin lesions via fly larvae, resulting in severe myiasis and/or wound contamination. Infections are typically associated with, but not limited to, infestation of an open wound by fly larvae, poor sanitary conditions, cardiovascular disease, substance abuse, and osteomyelitis. W. chitiniclastica is generally sensitive to a broad spectrum of antibiotics with the exception of fosfomycin. However, increasing drug resistance has been observed and its development should be monitored with caution. In this review, we summarize the currently available knowledge and evaluate it from both a clinical and a genomic perspective.
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Affiliation(s)
- Anna Kopf
- Clinic for Cardiology, Sana Heart Center, Leipziger Str. 50, 03048, Cottbus, Germany
- 2nd Medical Clinic for Hematology, Oncology, Pneumology and Nephrology, Carl-Thiem Hospital Cottbus gGmbH, Cottbus, Germany
| | - Boyke Bunk
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, Inhoffenstrasse 7 B, 38124, Braunschweig, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, Inhoffenstrasse 7 B, 38124, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Percy Schröttner
- Institute for Medical Microbiology and Virology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
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6
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Schober I, Bunk B, Carril G, Freese HM, Ojeda N, Riedel T, Meier-Kolthoff JP, Göker M, Spröer C, Flores-Herrera PA, Nourdin-Galindo G, Gómez F, Cárdenas C, Vásquez-Ponce F, Labra A, Figueroa J, Olivares-Pacheco J, Nübel U, Sikorski J, Marshall SH, Overmann J. Ongoing diversification of the global fish pathogen Piscirickettsia salmonis through genetic isolation and transposition bursts. ISME J 2023; 17:2247-2258. [PMID: 37853183 PMCID: PMC10689435 DOI: 10.1038/s41396-023-01531-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 09/28/2023] [Accepted: 10/02/2023] [Indexed: 10/20/2023]
Abstract
The management of bacterial pathogens remains a key challenge of aquaculture. The marine gammaproteobacterium Piscirickettsia salmonis is the etiological agent of piscirickettsiosis and causes multi-systemic infections in different salmon species, resulting in considerable mortality and substantial commercial losses. Here, we elucidate its global diversity, evolution, and selection during human interventions. Our comprehensive analysis of 73 closed, high quality genome sequences covered strains from major outbreaks and was supplemented by an analysis of all P. salmonis 16S rRNA gene sequences and metagenomic reads available in public databases. Genome comparison showed that Piscirickettsia comprises at least three distinct, genetically isolated species of which two showed evidence for continuing speciation. However, at least twice the number of species exist in marine fish or seawater. A hallmark of Piscirickettsia diversification is the unprecedented amount and diversity of transposases which are particularly active in subgroups undergoing rapid speciation and are key to the acquisition of novel genes and to pseudogenization. Several group-specific genes are involved in surface antigen synthesis and may explain the differences in virulence between strains. However, the frequent failure of antibiotic treatment of piscirickettsiosis outbreaks cannot be explained by horizontal acquisition of resistance genes which so far occurred only very rarely. Besides revealing a dynamic diversification of an important pathogen, our study also provides the data for improving its surveillance, predicting the emergence of novel lineages, and adapting aquaculture management, and thereby contributes towards the sustainability of salmon farming.
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Affiliation(s)
- Isabel Schober
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Boyke Bunk
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Gabriela Carril
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Heike M Freese
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Nicolás Ojeda
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Braunschweig-Hannover, Braunschweig, Germany
| | - Jan P Meier-Kolthoff
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Markus Göker
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Cathrin Spröer
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Patricio A Flores-Herrera
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Guillermo Nourdin-Galindo
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Fernando Gómez
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Constanza Cárdenas
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Núcleo Biotecnología Curauma, Pontificia Universidad Católica de Valparaíso, Campus Curauma, Valparaíso, Chile
| | - Felipe Vásquez-Ponce
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Alvaro Labra
- Laboratorio de Patógenos Acuícolas, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Jaime Figueroa
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Jorge Olivares-Pacheco
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Núcleo Milenio para la Investigación Colaborativa en Resistencia Antimicrobiana (MICROB-R), Santiago, Chile
| | - Ulrich Nübel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Braunschweig-Hannover, Braunschweig, Germany
- Institute of Microbiology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Johannes Sikorski
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Sergio H Marshall
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Núcleo Biotecnología Curauma, Pontificia Universidad Católica de Valparaíso, Campus Curauma, Valparaíso, Chile
| | - Jörg Overmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.
- German Center for Infection Research (DZIF), Partner Site Braunschweig-Hannover, Braunschweig, Germany.
- Institute of Microbiology, Technische Universität Braunschweig, Braunschweig, Germany.
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7
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Franke M, Riedel T, Meier R, Schmidt C, Kleinebudde P. Scale-up in twin-screw wet granulation: impact of formulation properties. Pharm Dev Technol 2023; 28:948-961. [PMID: 37889884 DOI: 10.1080/10837450.2023.2276791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 10/25/2023] [Indexed: 10/29/2023]
Abstract
The focus of this study was to investigate the sensitivity of different drug formulations to differences in process parameters based on previously developed scale-up strategies. Three different formulations were used for scale-up experiments from a QbCon® 1 with a screw diameter of 16 mm and a throughput of 2 kg/h to a QbCon® 25 line with a screw diameter of 25 mm and a throughput of 25 kg/h. Two of those formulations were similar in their composition of excipients but had a different API added to the blend to investigate the effect of solubility of the API during twin-screw wet granulation, while the third formulation was based on a controlled release formulation with different excipients and a high fraction of HPMC. The L/S-ratio had to be set specifically for each formulation as depending on the binder and the overall composition the blends varied significantly in their response to water addition and their overall granulation behavior. Before milling there were large differences in granule size distributions based on scale (Earth Mover's Distance 140-1100 µm, higher values indicating low similarity) for all formulations. However, no major differences in granule properties (e.g. Earth Mover's Distance for GSDs: 23-88 µm) or tablet tensile strength (> 1.8 MPa at a compaction pressure of 200 MPa for all formulations with a coefficient of variation < 0.1, indicating high robustness for all formulations) were observed after milling, which allowed for a successful scale-up independent of the selected formulations.
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Affiliation(s)
- Marcel Franke
- Department of Pharmaceutical Technologies, Merck Healthcare KGaA, Darmstadt, Germany
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University, Düsseldorf, Germany
| | - Thomas Riedel
- Department of Pharmaceutical Technologies, Merck Healthcare KGaA, Darmstadt, Germany
| | - Robin Meier
- L.B. Bohle Maschinen und Verfahren GmbH, Ennigerloh, Germany
| | - Carsten Schmidt
- Department of Pharmaceutical Technologies, Merck Healthcare KGaA, Darmstadt, Germany
| | - Peter Kleinebudde
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University, Düsseldorf, Germany
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8
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Blanco-Míguez A, Gálvez EJC, Pasolli E, De Filippis F, Amend L, Huang KD, Manghi P, Lesker TR, Riedel T, Cova L, Punčochář M, Thomas AM, Valles-Colomer M, Schober I, Hitch TCA, Clavel T, Berry SE, Davies R, Wolf J, Spector TD, Overmann J, Tett A, Ercolini D, Segata N, Strowig T. Extension of the Segatella copri complex to 13 species with distinct large extrachromosomal elements and associations with host conditions. Cell Host Microbe 2023; 31:1804-1819.e9. [PMID: 37883976 PMCID: PMC10635906 DOI: 10.1016/j.chom.2023.09.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 08/14/2023] [Accepted: 09/28/2023] [Indexed: 10/28/2023]
Abstract
The Segatella copri (formerly Prevotella copri) complex (ScC) comprises taxa that are key members of the human gut microbiome. It was previously described to contain four distinct phylogenetic clades. Combining targeted isolation with large-scale metagenomic analysis, we defined 13 distinct Segatella copri-related species, expanding the ScC complex beyond four clades. Complete genome reconstruction of thirteen strains from seven species unveiled the presence of genetically diverse large circular extrachromosomal elements. These elements are consistently present in most ScC species, contributing to intra- and inter-species diversities. The nine species-level clades present in humans display striking differences in prevalence and intra-species genetic makeup across human populations. Based on a meta-analysis, we found reproducible associations between members of ScC and the male sex and positive correlations with lower visceral fat and favorable markers of cardiometabolic health. Our work uncovers genomic diversity within ScC, facilitating a better characterization of the human microbiome.
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Affiliation(s)
| | - Eric J C Gálvez
- Department of Microbial Immune Regulation, Helmholtz Centre for Infection Research, Braunschweig, Germany; Hannover Medical School, Hannover, Germany; Roche Pharma Research and Early Development, Roche Innovation Center Basel, Basel, Switzerland
| | - Edoardo Pasolli
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Francesca De Filippis
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Lena Amend
- Department of Microbial Immune Regulation, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Kun D Huang
- Department of Microbial Immune Regulation, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Paolo Manghi
- Department CIBIO, University of Trento, Trento, Italy
| | - Till-Robin Lesker
- Department of Microbial Immune Regulation, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany; German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Linda Cova
- Department CIBIO, University of Trento, Trento, Italy
| | | | | | | | - Isabel Schober
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Thomas C A Hitch
- Functional Microbiome Research Group, Institute of Medical Microbiology, University Hospital of RWTH Aachen, Aachen, Germany
| | - Thomas Clavel
- Functional Microbiome Research Group, Institute of Medical Microbiology, University Hospital of RWTH Aachen, Aachen, Germany
| | - Sarah E Berry
- Department of Nutritional Sciences, King's College London, London, UK
| | | | | | - Tim D Spector
- Department of Twin Research, King's College London, London, UK
| | - Jörg Overmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany; German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany; Technical University of Braunschweig, Braunschweig, Germany
| | - Adrian Tett
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Wien, Austria
| | - Danilo Ercolini
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Nicola Segata
- Department CIBIO, University of Trento, Trento, Italy; Department of Experimental Oncology, IEO European Institute of Oncology IRCCS, Milan, Italy
| | - Till Strowig
- Department of Microbial Immune Regulation, Helmholtz Centre for Infection Research, Braunschweig, Germany; Hannover Medical School, Hannover, Germany; German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany; Centre for Individualized Infection Medicine, Hannover, Germany.
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9
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Vieira S, Riedel T, Geppert A, Rohde M, Wolf J, Neumann-Schaal M, Overmann J. Aurantibacillus circumpalustris gen. nov., sp. nov., the first characterized representative of the Bacteroidota candidate family env.OPS 17 and proposal of Aurantibacillaceae fam. nov. Int J Syst Evol Microbiol 2023; 73. [PMID: 37889152 DOI: 10.1099/ijsem.0.006134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2023] Open
Abstract
16S rRNA sequence types associated with the candidate family env.OPS 17 have been reported from various environments, but no representatives have been characterized and validly named. Bacteria of env.OPS 17 are affiliated with the order Sphingobacteriales and were first detected more than two decades ago in the vicinity of a thermal spring in Yellowstone National Park. Strain Swamp196T, isolated from the soil surrounding a swamp in Northern Germany, is the first characterized representative of candidate family env.OPS 17. Cells of strain Swamp196T are rod-shaped, non-motile, non-spore-forming, non-capsulated and stain Gram-negative. Colonies are small and orange-coloured. The strain is mesophilic and grows under aerobic or microaerophilic conditions. It grows chemo-organotrophically over a narrow range of pH and exclusively on proteinaceous substrates. The major cellular fatty acids are iso-C15 : 0, iso-C15 : 1 ω10c, C18 : 1 ω9c and C16 : 1 ω7c and the major polar lipids are two unidentified aminophospholipids, one unidentified aminolipid and one unidentified lipid. The predominant respiratory quinone is MK-7. The DNA G+C content of genomic DNA is 35.5 mol%. Strain Swamp196T is related to Pedobacter cryophilus AR-3-17T, Arcticibacter pallidicorallinus Hh36T and Pedobacter daechungensis Dae 13T with 16S rRNA gene sequence similarity of 84.1, 83.8 and 83.5 %, respectively. Based on our phenotypic, genomic and phylogenetic analysis, we propose the novel species Aurantibacillus circumpalustris sp. nov (type strain Swamp196T=DSM 105849T=CECT 30420T) of the novel genus Aurantibacillus gen. nov. and the novel family Aurantibacillaceae fam. nov.
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Affiliation(s)
- Selma Vieira
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Alicia Geppert
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Manfred Rohde
- Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Jacqueline Wolf
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Meina Neumann-Schaal
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Jörg Overmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
- Braunschweig University of Technology, Spielmannstraße 7, 38106 Braunschweig, Germany
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10
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Braun M, Ruscher L, Fuchs A, Kämpfer M, Huber M, Luedi MM, Riva T, Vogt A, Riedel T. Atelectasis in obese patients undergoing laparoscopic bariatric surgery are not increased upon discharge from Post Anesthesia Care Unit. Front Med (Lausanne) 2023; 10:1233609. [PMID: 37727763 PMCID: PMC10505733 DOI: 10.3389/fmed.2023.1233609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 07/31/2023] [Indexed: 09/21/2023] Open
Abstract
Background Obese patients frequently develop pulmonary atelectasis upon general anesthesia. The risk is increased during laparoscopic surgery. This prospective, observational single-center study evaluated atelectasis dynamics using Electric Impedance Tomography (EIT) in patients undergoing laparoscopic bariatric surgery. Methods We included adult patients with ASA physical status I-IV and a BMI of ≥40. Exclusion criteria were known severe pulmonary hypertension, home oxygen therapy, heart failure, and recent pulmonary infections. The primary outcome was the proportion of poorly ventilated lung regions (low tidal variation areas) and the global inhomogeneity (GI) index assessed by EIT before discharge from the Post Anesthesia Care Unit compared to these same measures prior to initiation of anesthesia. Results The median (IQR) proportion of low tidal variation areas at the different analysis points were T1 10.8% [3.6-15.1%] and T5 10.3% [2.6-18.9%], and the mean difference was -0.7% (95% CI: -5.8% -4.5%), i.e., lower than the predefined non-inferiority margin of 5% (p = 0.022). There were no changes at the four additional time points compared to T1 or postoperative pulmonary complications during the 14 days following the procedure. Conclusion We found that obese patients undergoing laparoscopic bariatric surgery do not leave the Post Anesthesia Care Unit with increased low tidal variation areas compared to the preoperative period.
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Affiliation(s)
- Matthias Braun
- Department of Anaesthesiology, Lindenhof Hospital, Bern, Switzerland
| | - Lea Ruscher
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Alexander Fuchs
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
- Unit for Research in Anaesthesia, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Martina Kämpfer
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Markus Huber
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Markus M. Luedi
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Thomas Riva
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Andreas Vogt
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Thomas Riedel
- Division of Paediatric Intensive Care Medicine, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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11
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Riedel T, Bunk B, Schröttner P. Editorial: Characterization of rare and recently first described human pathogenic bacteria. Front Cell Infect Microbiol 2023; 13:1212627. [PMID: 37469593 PMCID: PMC10353429 DOI: 10.3389/fcimb.2023.1212627] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 06/19/2023] [Indexed: 07/21/2023] Open
Affiliation(s)
- Thomas Riedel
- Department of Microbial Ecology und Diversity Research, Leibniz Institute, German Collection of Microorganisms and Cell Cultures (DSMZ) GmbH, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Boyke Bunk
- Department of Bioinformatics and Database, Leibniz Institute, German Collection of Microorganisms and Cell Cultures (DSMZ) GmbH, Braunschweig, Germany
| | - Percy Schröttner
- Carl Gustav Carus Faculty of Medicine, University Hospital Carl Gustav Carus Dresden, Institute for Medical Microbiology and Virology, Technical University (TU) Dresden, Dresden, Germany
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12
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Endrich O, Triep K, Schlapbach LJ, Posfay-Barbe KM, Heininger U, Giannoni E, Stocker M, Niederer-Loher A, Kahlert CR, Natalucci G, Relly C, Riedel T, Aebi C, Berger C, Agyeman PKA. Sensitivity of ICD coding for sepsis in children-a population-based study. Intensive Care Med Paediatr Neonatal 2023; 1:5. [PMID: 37342815 PMCID: PMC10261837 DOI: 10.1007/s44253-023-00006-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 05/16/2023] [Indexed: 06/23/2023]
Abstract
Background International Classification of Diseases 10th edition (ICD-10) is widely used to describe the burden of disease. Aim To describe how well ICD-10 coding captures sepsis in children admitted to the hospital with blood culture-proven bacterial or fungal infection and systemic inflammatory response syndrome. Methods Secondary analysis of a population-based, multicenter, prospective cohort study on children with blood culture-proven sepsis of nine tertiary pediatric hospitals in Switzerland. We compared the agreement of validated study data on sepsis criteria with ICD-10 coding abstraction obtained at the participating hospitals. Results We analyzed 998 hospital admissions of children with blood culture-proven sepsis. The sensitivity of ICD-10 coding abstraction was 60% (95%-CI 57-63) for sepsis; 35% (95%-CI 31-39) for sepsis with organ dysfunction, using an explicit abstraction strategy; and 65% (95%-CI 61-69) using an implicit abstraction strategy. For septic shock, the sensitivity of ICD-10 coding abstraction was 43% (95%-CI 37-50). Agreement of ICD-10 coding abstraction with validated study data varied by the underlying infection type and disease severity (p < 0.05). The estimated national incidence of sepsis, inferred from ICD-10 coding abstraction, was 12.5 per 100,000 children (95%-CI 11.7-13.5) and 21.0 per 100,000 children (95%-CI 19.8-22.2) using validated study data. Conclusions In this population-based study, we found a poor representation of sepsis and sepsis with organ dysfunction by ICD-10 coding abstraction in children with blood culture-proven sepsis when compared against a prospective validated research dataset. Sepsis estimates in children based on ICD-10 coding may thus severely underestimate the true prevalence of the disease. Supplementary Information The online version contains supplementary material available at 10.1007/s44253-023-00006-1.
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Affiliation(s)
- Olga Endrich
- Department of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Medical Directorate, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Karen Triep
- Medical Directorate, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Luregn J. Schlapbach
- Department of Intensive Care and Neonatology, and Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
- Child Health Research Center, University of Queensland, Brisbane, Australia
| | - Klara M. Posfay-Barbe
- Pediatric Infectious Diseases Unit, Children’s Hospital of Geneva, University Hospitals of Geneva, Geneva, Switzerland
| | - Ulrich Heininger
- Infectious Diseases and Vaccinology, University of Basel Children’s Hospital, Basel, Switzerland
| | - Eric Giannoni
- Clinic of Neonatology, Department Mother-Woman-Child, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | | | | | | | - Giancarlo Natalucci
- Family Larsson-Rosenquist Foundation Centre for Neurodevelopment, Growth and Nutrition of the Newborn, Department of Neonatology, University Hospital Zurich, Zurich, Switzerland
| | - Christa Relly
- Division of Infectious Diseases and Hospital Epidemiology, Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Thomas Riedel
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of Pediatrics, Cantonal Hospital Graubuenden, Chur, Switzerland
| | - Christoph Aebi
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Christoph Berger
- Division of Infectious Diseases and Hospital Epidemiology, Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Philipp K. A. Agyeman
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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13
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Franke M, Riedel T, Meier R, Schmidt C, Kleinebudde P. Comparison of scale-up strategies in twin-screw wet granulation. Int J Pharm 2023; 641:123052. [PMID: 37196882 DOI: 10.1016/j.ijpharm.2023.123052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 05/19/2023]
Abstract
The aim of this study was to compare different scale-up strategies in twin-screw wet granulation and investigate the impact of the selected strategy on granule and tablet properties for a defined formulation. For the scale-up, a granulation process was transferred from a QbCon® 1 with a screw diameter of 16mm to a QbCon® 25 line with a screw diameter of 25mm. Three different scale-up strategies were introduced based on differences in process parameters and their resulting effects on various aspects. such as the powder feed number as a surrogate for the barrel fill level or the circumferential speed. Both are highly dependent on screw diameter and screw speed (SS), while the barrel fill level also depends on the overall throughput. Granules produced on the larger scale were significantly larger due to the larger gap size in the granulator, however, these differences were eliminated after milling. Despite major differences in powder feed number, circumferential speed, overall throughput and SS, product properties for both tablets and granules were strikingly similar after milling on both scales and with all applied strategies. For the selected formulation the effect of varying liquid to solid ratio at the same scale was much higher than the differences between scale-up strategies. The results of this study are promising for future process scale-up from lab scale to production scale in twin-screw wet granulation, as they are indicating towards a robust granulation process leading to similar tablet properties afterwards.
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Affiliation(s)
- Marcel Franke
- Merck Healthcare KGaA, Department of Pharmaceutical Technologies, Darmstadt, Germany; Heinrich Heine University, Institute of Pharmaceutics and Biopharmaceutics, Universitätsstr. 1, Building 26.22, Düsseldorf, Germany
| | - Thomas Riedel
- Merck Healthcare KGaA, Department of Pharmaceutical Technologies, Darmstadt, Germany
| | - Robin Meier
- L.B. Bohle Maschinen und Verfahren GmbH, Ennigerloh, Germany
| | - Carsten Schmidt
- Merck Healthcare KGaA, Department of Pharmaceutical Technologies, Darmstadt, Germany
| | - Peter Kleinebudde
- Heinrich Heine University, Institute of Pharmaceutics and Biopharmaceutics, Universitätsstr. 1, Building 26.22, Düsseldorf, Germany.
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14
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Zautner AE, Riedel T, Bunk B, Spröer C, Boahen KG, Akenten CW, Dreyer A, Färber J, Kaasch AJ, Overmann J, May J, Dekker D. Molecular characterization of Arcobacter butzleri isolates from poultry in rural Ghana. Front Cell Infect Microbiol 2023; 13:1094067. [PMID: 36761899 PMCID: PMC9905251 DOI: 10.3389/fcimb.2023.1094067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/09/2023] [Indexed: 01/27/2023] Open
Abstract
In recent years, Arcobacter butzleri has gained clinical significance as an emerging diarrheagenic pathogen associated with poultry and water reservoirs. The full clinical significance of Arcobacter remains rather speculative due to variable virulence and antibiotic susceptibility of individual strains. The aims of the present study were (i) to identify antibiotic resistance genes (ARGs) in the genome sequences of two multidrug-resistant A. butzleri isolates, (ii) to use multilocus-sequence typing (MLST) to generate a guiding phylogeny of A. butzleri isolates collected in Kumasi, Ghana, (iii) to examine the distribution of ARGs in the test cohort, and (iv) to assess the strain's virulence and possible antibiotic treatment options for arcobacteriosis based on the genome sequences and the ARG distribution. A total of 48 A. butzleri isolates obtained from poultry were included in the analysis. These isolates were genotyped by MLST and the antibiotic susceptibilities of isolates to ampicillin, ciprofloxacin, tetracycline, gentamicin, and erythromycin were tested by disk diffusion. Whole genome sequence data of two multidrug-resistant (MDR) A. butzleri isolates were obtained by a combination of single-molecule real-time (SMRT) and Illumina sequencing technology. A total of 14 ARGs were identified in the two generated genome sequences. For all 48 isolates, the frequency of these 14 ARGs was investigated by PCR or amplicon sequencing. With 44 different sequence types found among 48 isolates, strains were phylogenetically heterogeneous. Four of 48 isolates showed an ARG constellation indicating a multidrug-resistant phenotype. The virulence genes in the two A. butzleri genomes showed that the species might be characterized by a somewhat lower virulence as Campylobacter species. The phenotypic susceptibility data combined with the distribution of the particular ARGs especially oxa-464 and the T81I point mutation of the quinolone resistance determining region (QRDR) in a significant percentage of isolates indicated that macrolides and tetracycline can be recommended for calculated antibiotic treatment of arcobacteriosis in Ghana, but not ampicillin and quinolones.
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Affiliation(s)
- Andreas E. Zautner
- Institut für Medizinische Mikrobiologie und Krankenhaushygiene, Universitätsklinikum Magdeburg, Magdeburg, Germany,*Correspondence: Andreas E. Zautner,
| | - Thomas Riedel
- Abteilung Mikrobielle Ökologie und Diversitätsforschung, Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany,Deutsches Zentrum für Infektionsforschung (DZIF), Hannover–Braunschweig, Germany
| | - Boyke Bunk
- Abteilung Bioinformatik und Datenbanken, Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany
| | - Cathrin Spröer
- Abteilung Bioinformatik und Datenbanken, Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany
| | - Kennedy G. Boahen
- One Health Bacteriology Group, Kumasi Centre for Collaborative Research in Tropical Medicine (KCCR), Kumasi, Ghana
| | - Charity Wiafe Akenten
- One Health Bacteriology Group, Kumasi Centre for Collaborative Research in Tropical Medicine (KCCR), Kumasi, Ghana
| | - Annika Dreyer
- Institut für Medizinische Mikrobiologie und Virology, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Jacqueline Färber
- Institut für Medizinische Mikrobiologie und Krankenhaushygiene, Universitätsklinikum Magdeburg, Magdeburg, Germany
| | - Achim J. Kaasch
- Institut für Medizinische Mikrobiologie und Krankenhaushygiene, Universitätsklinikum Magdeburg, Magdeburg, Germany
| | - Jörg Overmann
- Abteilung Mikrobielle Ökologie und Diversitätsforschung, Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany,Deutsches Zentrum für Infektionsforschung (DZIF), Hannover–Braunschweig, Germany
| | - Jürgen May
- Abteilung für Infektionsepidemiologie, Bernhard-Nocht-Institut für Tropenmedizin (BNITM), Hamburg, Germany,Deutsches Zentrum für Infektionsforschung (DZIF), Hamburg-Borstel-Lübeck, Germany
| | - Denise Dekker
- Abteilung für Infektionsepidemiologie, Bernhard-Nocht-Institut für Tropenmedizin (BNITM), Hamburg, Germany,Deutsches Zentrum für Infektionsforschung (DZIF), Hamburg-Borstel-Lübeck, Germany
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15
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van der Velden FJS, de Vries G, Martin A, Lim E, von Both U, Kolberg L, Carrol ED, Khanijau A, Herberg JA, De T, Galassini R, Kuijpers TW, Martinón-Torres F, Rivero-Calle I, Vermont CL, Hagedoorn NN, Pokorn M, Pollard AJ, Schlapbach LJ, Tsolia M, Elefhteriou I, Yeung S, Zavadska D, Fink C, Voice M, Zenz W, Kohlmaier B, Agyeman PKA, Usuf E, Secka F, de Groot R, Levin M, van der Flier M, Emonts M, Cunnington A, De T, Herberg J, Kaforou M, Wright V, Baumard L, Bellos E, D’Souza G, Galassini R, Habgood-Coote D, Hamilton S, Hoggart C, Hourmat S, Jackson H, Maconochie I, Menikou S, Lin N, Nichols S, Nijman R, Powell O, Pena Paz I, Shah P, Shen CF, Vito O, Wilson C, Abdulla A, Ali L, Darnell S, Jorgensen R, Mustafa S, Persand S, Stevens MM, Kim N, Kim E, Fidler K, Dudley J, Richmond V, Tavliavini E, Shen CF, Liu CC, Wang SM, Martinón-Torres F, Salas A, González FÁ, Farto CB, Barral-Arca R, Castro MB, Bello X, García MB, Carnota S, Cebey-López M, Curras-Tuala MJ, Suárez CD, Vicente LG, Gómez-Carballa A, Rial JG, Iglesias PL, Martinón-Torres F, Martinón-Torres N, Sánchez JMM, Pérez BM, Pardo-Seco J, Rodríguez LP, Pischedda S, Vázquez SR, Calle IR, Rodríguez-Tenreiro C, Redondo-Collazo L, Ora MS, Salas A, Fernández SS, Trasorras CS, Iglesias MV, Zavadska D, Balode A, Bārzdiņa A, Deksne D, Gardovska D, Grāvele D, Grope I, Meiere A, Nokalna I, Pavāre J, Pučuka Z, Selecka K, Rudzāte A, Svile D, Urbāne UN, Usuf E, Bojang K, Zaman SMA, Secka F, Anderson S, Sarr AR, Saidykhan M, Darboe S, Ceesay S, D’alessandro U, Moll HA, Vermont CL, Borensztajn DM, Hagedoorn NN, Tan C, Zachariasse J, Dik W, Agyeman PKA, Berger C, Giannoni E, Stocker M, Posfay-Barbe KM, Heininger U, Bernhard-Stirnemann S, Niederer-Loher A, Kahlert CR, Natalucci G, Relly C, Riedel T, Aebi C, Schlapbach LJ, Carrol ED, Cocklin E, Jennings R, Johnston J, Khanijau A, Leigh S, Lewis-Burke N, Newall K, Romaine S, Tsolia M, Eleftheriou I, Tambouratzi M, Marmarinos A, Xagorari M, Syggelou K, Fink C, Voice M, Calvo-Bado L, Zenz W, Kohlmaier B, Schweintzger NA, Sagmeister MG, Kohlfürst DS, Zurl C, Binder A, Hösele S, Leitner M, Pölz L, Rajic G, Bauchinger S, Baumgart H, Benesch M, Ceolotto A, Eber E, Gallistl S, Gores G, Haidl H, Hauer A, Hude C, Keldorfer M, Krenn L, Pilch H, Pfleger A, Pfurtscheller K, Nordberg G, Niedrist T, Rödl S, Skrabl-Baumgartner A, Sperl M, Stampfer L, Strenger V, Till H, Trobisch A, Löffler S, Yeung S, Dewez JE, Hibberd M, Bath D, Miners A, Nijman R, Fitchett E, de Groot R, van der Flier M, de Jonge MI, van Aerde K, Alkema W, van den Broek B, Gloerich J, van Gool AJ, Henriet S, Huijnen M, Philipsen R, Willems E, Gerrits G, van Leur M, Heidema J, de Haan L, Miedema C, Neeleman C, Obihara C, Tramper-Stranders G, Pollard AJ, Kandasamy R, Paulus S, Carter MJ, O’Connor D, Bibi S, Kelly DF, Gurung M, Thorson S, Ansari I, Murdoch DR, Shrestha S, Oliver Z, Emonts M, Lim E, Valentine L, Allen K, Bell K, Chan A, Crulley S, Devine K, Fabian D, King S, McAlinden P, McDonald S, McDonnell A, Pickering A, Thomson E, Wood A, Wallia D, Woodsford P, Baxter F, Bell A, Rhodes M, Agbeko R, Mackerness C, Baas B, Kloosterhuis L, Oosthoek W, Arif T, Bennet J, Collings K, van der Giessen I, Martin A, Rashid A, Rowlands E, de Vries G, van der Velden F, Soon J, Valentine L, Martin M, Mistry R, von Both U, Kolberg L, Zwerenz M, Buschbeck J, Bidlingmaier C, Binder V, Danhauser K, Haas N, Griese M, Feuchtinger T, Keil J, Kappler M, Lurz E, Muench G, Reiter K, Schoen C, Mallet F, Brengel-Pesce K, Pachot A, Mommert M, Pokorn M, Kolnik M, Vincek K, Srovin TP, Bahovec N, Prunk P, Osterman V, Avramoska T, Kuijpers T, Jongerius I, van den Berg JM, Schonenberg D, Barendregt AM, Pajkrt D, van der Kuip M, van Furth AM, Sprenkeler E, Zandstra J, van Mierlo G, Geissler J. Correction to: Febrile illness in high-risk children: a prospective, international observational study. Eur J Pediatr 2023; 182:555-556. [PMID: 36689005 PMCID: PMC9899168 DOI: 10.1007/s00431-022-04788-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Fabian J. S. van der Velden
- grid.459561.a0000 0004 4904 7256Paediatric Immunology, Infectious Diseases & Allergy, Great North Children’s Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK ,grid.1006.70000 0001 0462 7212Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Gabriella de Vries
- grid.459561.a0000 0004 4904 7256Paediatric Immunology, Infectious Diseases & Allergy, Great North Children’s Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK ,grid.416135.40000 0004 0649 0805Department of General Paediatrics, Erasmus MC-Sophia Children’s Hospital, Rotterdam, The Netherlands
| | - Alexander Martin
- grid.459561.a0000 0004 4904 7256Paediatric Immunology, Infectious Diseases & Allergy, Great North Children’s Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK ,grid.1006.70000 0001 0462 7212Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Emma Lim
- grid.459561.a0000 0004 4904 7256Paediatric Immunology, Infectious Diseases & Allergy, Great North Children’s Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK ,grid.1006.70000 0001 0462 7212Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Ulrich von Both
- grid.5252.00000 0004 1936 973XDivision Paediatric Infectious Diseases, Dr. Von Hauner Children’s Hospital, University Hospital LMU Munich, Munich, Germany
| | - Laura Kolberg
- grid.5252.00000 0004 1936 973XDivision Paediatric Infectious Diseases, Dr. Von Hauner Children’s Hospital, University Hospital LMU Munich, Munich, Germany
| | - Enitan D. Carrol
- grid.10025.360000 0004 1936 8470Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK ,grid.417858.70000 0004 0421 1374Alder Hey Children’s NHS Foundation Trust, Liverpool, UK
| | - Aakash Khanijau
- grid.10025.360000 0004 1936 8470Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK ,grid.417858.70000 0004 0421 1374Alder Hey Children’s NHS Foundation Trust, Liverpool, UK
| | - Jethro A. Herberg
- grid.7445.20000 0001 2113 8111Section of Paediatric Infectious Disease, Wright-Fleming Institute, Imperial College London, London, UK
| | - Tisham De
- grid.7445.20000 0001 2113 8111Section of Paediatric Infectious Disease, Wright-Fleming Institute, Imperial College London, London, UK
| | - Rachel Galassini
- grid.7445.20000 0001 2113 8111Section of Paediatric Infectious Disease, Wright-Fleming Institute, Imperial College London, London, UK
| | - Taco W. Kuijpers
- grid.7177.60000000084992262Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Amsterdam University Medical Center, Location Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Federico Martinón-Torres
- grid.411048.80000 0000 8816 6945Pediatrics Department, Translational Pediatrics and Infectious Diseases, Hospital Clínico Universitario de Santiago, Santiago de Compostela, Spain ,grid.11794.3a0000000109410645Grupo de Genetica, Vacunas, Infecciones y Pediatria, Instituto de Investigacion Sanitaria de Santiago, Universidad de Santiago, Santiago de Compostela, Spain ,grid.512891.6Consorcio Centro de Investigacion Biomedicaen Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain
| | - Irene Rivero-Calle
- grid.411048.80000 0000 8816 6945Pediatrics Department, Translational Pediatrics and Infectious Diseases, Hospital Clínico Universitario de Santiago, Santiago de Compostela, Spain
| | - Clementien L. Vermont
- grid.416135.40000 0004 0649 0805Department of Pediatrics, Division of Pediatric Infectious Diseases & Immunology, Erasmus MC-Sophia Children’s Hospital, Rotterdam, The Netherlands
| | - Nienke N. Hagedoorn
- grid.416135.40000 0004 0649 0805Department of General Paediatrics, Erasmus MC-Sophia Children’s Hospital, Rotterdam, The Netherlands
| | - Marko Pokorn
- grid.29524.380000 0004 0571 7705University Children’s Hospital, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Andrew J. Pollard
- grid.4991.50000 0004 1936 8948Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, UK
| | - Luregn J. Schlapbach
- grid.412341.10000 0001 0726 4330Neonatal and Pediatric Intensive Care Unit, Children’s Research Center, University Children’s Hospital Zürich, University of Zürich, Zurich, Switzerland
| | - Maria Tsolia
- grid.5216.00000 0001 2155 08002nd Department of Pediatrics, National and Kapodistrian University of Athens, Children’s Hospital ‘P, and A. Kyriakou’, Athens, Greece
| | - Irini Elefhteriou
- grid.5216.00000 0001 2155 08002nd Department of Pediatrics, National and Kapodistrian University of Athens, Children’s Hospital ‘P, and A. Kyriakou’, Athens, Greece
| | - Shunmay Yeung
- grid.8991.90000 0004 0425 469XClinical Research Department, Faculty of Infectious and Tropical Disease, London School of Hygiene and Tropical Medicine, London, UK
| | - Dace Zavadska
- grid.17330.360000 0001 2173 9398Department of Pediatrics, Rīgas Stradina Universitāte, Children’s Clinical University Hospital, Riga, Latvia
| | - Colin Fink
- grid.7372.10000 0000 8809 1613Micropathology Ltd, University of Warwick, Warwick, UK
| | - Marie Voice
- grid.7372.10000 0000 8809 1613Micropathology Ltd, University of Warwick, Warwick, UK
| | - Werner Zenz
- grid.11598.340000 0000 8988 2476Department of Pediatrics and Adolescent Medicine, Division of General Pediatrics, Medical University of Graz, Graz, Austria
| | - Benno Kohlmaier
- grid.11598.340000 0000 8988 2476Department of Pediatrics and Adolescent Medicine, Division of General Pediatrics, Medical University of Graz, Graz, Austria
| | - Philipp K. A. Agyeman
- grid.5734.50000 0001 0726 5157Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Effua Usuf
- grid.415063.50000 0004 0606 294XMedical Research Council Unit, Serrekunda, The Gambia
| | - Fatou Secka
- grid.415063.50000 0004 0606 294XMedical Research Council Unit, Serrekunda, The Gambia
| | - Ronald de Groot
- grid.461578.9Pediatric Infectious Diseases and Immunology, Amalia Children’s Hospital, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Michael Levin
- grid.7445.20000 0001 2113 8111Section of Paediatric Infectious Disease, Wright-Fleming Institute, Imperial College London, London, UK
| | - Michiel van der Flier
- grid.461578.9Pediatric Infectious Diseases and Immunology, Amalia Children’s Hospital, Radboud University Medical Center, Nijmegen, The Netherlands ,grid.7692.a0000000090126352Pediatric Infectious Diseases and Immunology, Wilhelmina Children’s Hospital University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marieke Emonts
- Paediatric Immunology, Infectious Diseases & Allergy, Great North Children's Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK. .,Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK. .,NIHR Newcastle Biomedical Research Centre, Newcastle upon Tyne Hospitals NHS Trust and Newcastle University, Newcastle upon Tyne, UK.
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16
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Goedecke F, Bühring J, Kratz A, Schweiger W, Köhle C, Waidner U, Riedel T, Walter A, Skrowny P, Rothenaicher G, Segiet A, Rabczenko D, Rogers A, Rippon M. An observational study of wounds treated with hydro-responsive wound dressings. J Wound Care 2022; 31:1029-1038. [PMID: 36475853 DOI: 10.12968/jowc.2022.31.12.1029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Acute and hard-to-heal wounds are a significant burden to both a patient's quality of life and resources in healthcare systems. Here, we evaluate the outcomes of a non-comparative case series study in which Ringer's solution-preactivated polyacrylate dressings were used to treat acute and hard-to-heal wounds (the presence of Ringer's solution provides a wound dressing that allows, upon application, the immediate hydration of the underlying wound tissue). METHOD Patients with acute and hard-to-heal wounds were enrolled into an open-labelled, non-comparative observational study. Patients were treated with Ringer's solution-preactivated polyacrylate dressings to enable wound debridement and wound cleansing for up to 12 weeks. RESULTS A total of 303 patients were enrolled in the study and 278 were included in the analysis. Wound size decreased, from a median of 3.6cm2 (interquartile range (IQR): 1.2-9.3] at baseline to a median of 2.6cm2 (IQR: 1.1-7.8] at 84 days. Relative wound area reduction (WAR) was 43.1% at 84 days and estimated probability of achievement of a WAR of ≥40% and ≥60% was 68.7% and 53.4%, respectively. Median time to achieve a WAR of ≥40% and ≥60% was 54 days and 75 days, respectively. The median percentage of wound area covered by fibrin had decreased from 50.0% to 10% and granulation tissue had increased from 25% to 50% after 84 days. In addition, periwound skin condition, local signs of infection and pain all showed improvement. The majority of the wounds were assessed as 'healed' or 'better' at the conclusion of the evaluation period. CONCLUSION Based on the findings of this study, the use of Ringer's solution-preactivated polyacrylate dressings in daily practice has the potential to improve clinical outcomes, including healing, in patients with acute and hard-to-heal wounds.
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Affiliation(s)
| | - Jan Bühring
- MVZ für Chirurgie und Orthopädie am Vincentinum PmbB, Augsburg, Germany
| | | | | | | | | | | | | | | | | | | | | | | | - Mark Rippon
- Huddersfield University, Huddersfield, UK.,Daneriver Consultancy Ltd, Holmes Chapel, UK
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17
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Bigge R, Bunk B, Rudolph WW, Gunzer F, Coldewey SM, Riedel T, Schröttner P. Comparative Study of Different Diagnostic Routine Methods for the Identification of Acinetobacter radioresistens. Microorganisms 2022; 10:microorganisms10091767. [PMID: 36144369 PMCID: PMC9503985 DOI: 10.3390/microorganisms10091767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/19/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
Recent publications indicate that A. radioresistens can cause infections in humans, even though it is rarely reported in routine diagnostics. However, the fact that it is infrequently detected may be explained by the misidentification of the species by conventional methods. It is also likely that A. radioresistens is not considered clinically relevant and therefore not consistently included in diagnostic results. To elucidate the medical significance of this probably clinically underestimated bacterial species, we created a well-documented reference strain collection of 21 strains collected in routine diagnostics. For further analysis of A. radioresistens, it is essential to know which methods can be used to achieve a trustworthy identification. We, therefore, compared three methods widely used in routine diagnostics (MALDI-TOF MS, VITEK 2, and sequencing of housekeeping genes) in terms of secure and reliable identification of A. radioresistens. As reference methods, whole genome-based approaches were applied. VITEK 2 led to misidentification for four strains. However, MALDI-TOF MS and sequencing of housekeeping genes led to reliable and robust identifications.
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Affiliation(s)
- Richard Bigge
- Institute for Microbiology and Virology, University Hospital Carl Gustav Carus, 01307 Dresden, Germany
| | - Boyke Bunk
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, 38124 Braunschweig, Germany
| | - Wolfram W. Rudolph
- Department of Hospital Infection Control, University Hospital Carl Gustav Carus, 01307 Dresden, Germany
| | - Florian Gunzer
- Department of Hospital Infection Control, University Hospital Carl Gustav Carus, 01307 Dresden, Germany
| | - Sina M. Coldewey
- Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, 07745 Jena, Germany
- Septomics Research Center, Jena University Hospital, 07747 Jena, Germany
- Center for Sepsis Control and Care, Jena University Hospital, 07747 Jena, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, 38124 Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Percy Schröttner
- Institute for Microbiology and Virology, University Hospital Carl Gustav Carus, 01307 Dresden, Germany
- Correspondence: ; Tel.: +49-(351)-458-16585
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18
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Kopf A, Bunk B, Coldewey SM, Gunzer F, Riedel T, Schröttner P. Comparative Genomic Analysis of the Human Pathogen Wohlfahrtiimonas Chitiniclastica Provides Insight Into the Identification of Antimicrobial Resistance Genotypes and Potential Virulence Traits. Front Cell Infect Microbiol 2022; 12:912427. [PMID: 35873140 PMCID: PMC9301364 DOI: 10.3389/fcimb.2022.912427] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 06/02/2022] [Indexed: 11/20/2022] Open
Abstract
Recent studies suggest that Wohlfahrtiimonas chitiniclastica may be the cause of several diseases in humans including sepsis and bacteremia making the bacterium as a previously underappreciated human pathogen. However, very little is known about the pathogenicity and genetic potential of W. chitiniclastica; therefore, it is necessary to conduct systematic studies to gain a deeper understanding of its virulence characteristics and treatment options. In this study, the entire genetic repertoire of all publicly available W. chitiniclastica genomes was examined including in silico characterization of bacteriophage content, antibiotic resistome, and putative virulence profile. The pan-genome of W. chitiniclastica comprises 3819 genes with 1622 core genes (43%) indicating a putative metabolic conserved species. Furthermore, in silico analysis indicated presumed resistome expansion as defined by the presence of genome-encoded transposons and bacteriophages. While macrolide resistance genes macA and macB are located within the core genome, additional antimicrobial resistance genotypes for tetracycline (tetH, tetB, and tetD), aminoglycosides (ant(2’’)-Ia, aac(6’)-Ia,aph(3’’)-Ib, aph(3’)-Ia, and aph(6)-Id)), sulfonamide (sul2), streptomycin (strA), chloramphenicol (cat3), and beta-lactamase (blaVEB) are distributed among the accessory genome. Notably, our data indicate that the type strain DSM 18708T does not encode any additional clinically relevant antibiotic resistance genes, whereas drug resistance is increasing within the W. chitiniclastica clade. This trend should be monitored with caution. To the best of our knowledge, this is the first comprehensive genome analysis of this species, providing new insights into the genome of this opportunistic human pathogen.
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Affiliation(s)
- Anna Kopf
- Medical Microbiology and Virology, University Hospital Carl Gustav Carus, Dresden, Germany
- Clinic for Hematology and Oncology, Carl-Thiem-Klinikum, Cottbus, Germany
| | - Boyke Bunk
- German Collection of Microorganisms and Cell Cultures GmbH, Leibniz Institute DSMZ, Braunschweig, Germany
| | - Sina M. Coldewey
- Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, Jena, Germany
- Septomics Research Center, Jena University Hospital, Jena, Germany
| | - Florian Gunzer
- Department of Hospital Infection Control, University Hospital Carl Gustav Carus, Dresden, Germany
| | - Thomas Riedel
- German Collection of Microorganisms and Cell Cultures GmbH, Leibniz Institute DSMZ, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Percy Schröttner
- Medical Microbiology and Virology, University Hospital Carl Gustav Carus, Dresden, Germany
- *Correspondence: Percy Schröttner,
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19
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Casaulta C, Messerli F, Rodriguez R, Klein A, Riedel T. Changes in ventilation distribution in children with neuromuscular disease using the insufflator/exsufflator technique: an observational study. Sci Rep 2022; 12:7009. [PMID: 35488044 PMCID: PMC9054802 DOI: 10.1038/s41598-022-11190-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 04/18/2022] [Indexed: 11/24/2022] Open
Abstract
Patients with neuromuscular disease often suffer from weak and ineffective cough resulting in mucus retention and increased risk for chest infections. Different airway clearance techniques have been proposed, one of them being the insufflator/exsufflator technique. So far, the immediate physiological effects of the insufflator/exsufflator technique on ventilation distribution and lung volumes are not known. We aimed to describe the immediate effects of the insufflator/exsufflator technique on different lung volumes, forced flows and ventilation distribution. Eight subjects (age 5.8–15.2 years) performed lung function tests including spirometry, multiple breath washout and electrical impedance tomography before and after a regular a chest physiotherapy session with an insufflator/exsufflator device. Forced lung volumes and flows as well as parameters of ventilation distribution derived from multiple breath washout and electrical impedance tomography were compared to assess the short-term effect of the therapy. In this small group of stable paediatric subjects with neuromuscular disease we could not demonstrate any short-term effects of insufflation/exsufflation manoeuvres on lung volumes, expiratory flows and ventilation distribution. With the currently used protocol of the insufflation/exsufflation manoeuvre, we cannot demonstrate any immediate changes in lung function.
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Affiliation(s)
- Carmen Casaulta
- Division of Paediatric Pulmonology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010, Bern, Switzerland.,Division of Paediatric Intensive Care, Department of Paediatrics, Inselspital, Bern University Hospital, Univeristy of Bern, Freiburgstrasse 15, 3010, Bern, Switzerland
| | - Florence Messerli
- Division of Paediatric Pulmonology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010, Bern, Switzerland
| | - Romy Rodriguez
- Division of Paediatric Pulmonology, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010, Bern, Switzerland
| | - Andrea Klein
- Division of Paediatric Neurology, Department of Paediatrics, Inselspital, Bern University Hospital, Univeristy of Bern, Freiburgstrasse 15, 3010, Bern, Switzerland.,Paediatric Neurology, University Childrens Hospital Basel, UKBB, University of Basel, Spitalstrasse 33, 4056, Basel, Switzerland
| | - Thomas Riedel
- Division of Paediatric Intensive Care, Department of Paediatrics, Inselspital, Bern University Hospital, Univeristy of Bern, Freiburgstrasse 15, 3010, Bern, Switzerland. .,Department of Paediatrics, Cantonal Hospital Graubuenden, Loestrasse 170, 7000, Chur, Switzerland.
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20
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Sagawa R, Yasuhara A, Hashiguchi H, Naganuma T, Tanba S, Ishikawa T, Riedel T, Hartel P, Linck M, Uhlemann S, Müller H, Sawada H. Exploiting the full potential of the advanced two-hexapole corrector for STEM exemplified at 60kV. Ultramicroscopy 2022; 233:113440. [PMID: 34920279 DOI: 10.1016/j.ultramic.2021.113440] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 11/14/2021] [Accepted: 11/27/2021] [Indexed: 11/19/2022]
Abstract
Ultimate resolution in scanning transmission electron microscopy (STEM) with state-of-the-art aberration correctors requires careful tuning of the experimental parameters. The optimum aperture semi-angle depends on the chosen high tension, the chromatic aberration and the energy width of the source as well as on potentially limiting intrinsic residual aberrations. In this paper we derive simple expressions and criteria for choosing the aperture semi-angle and for counterbalancing the intrinsic sixth-order three-lobe aberration of two-hexapole aberration correctors by means of the fourth-order three-lobe aberration. It is noteworthy that for such an optimally adjusted electron probe the so-called flat area of the Ronchigram is explicitly not maximized. The above considerations are validated by experiments with a CEOS ASCOR in a C-FEG-equipped JEOL NEOARM operated at 60 kV. Sub-Angstrom resolution is demonstrated for a Si[112] single crystal as well as for a single-layered MoS2 crystalline film. Lattice reflections of 73 pm for silicon and 93 pm for molybdenum disulfide are visible in the Fourier transform of the images, respectively. Moreover, single sulfur vacancies can be clearly identified in the MoS2.
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Affiliation(s)
- Ryusuke Sagawa
- JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan.
| | - Akira Yasuhara
- JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan
| | | | | | - Shinichi Tanba
- JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan
| | | | - Thomas Riedel
- Corrected Electron Optical Systems GmbH, Englerstr. 28, Heidelberg 69126, Germany
| | - Peter Hartel
- Corrected Electron Optical Systems GmbH, Englerstr. 28, Heidelberg 69126, Germany
| | - Martin Linck
- Corrected Electron Optical Systems GmbH, Englerstr. 28, Heidelberg 69126, Germany
| | - Stephan Uhlemann
- Corrected Electron Optical Systems GmbH, Englerstr. 28, Heidelberg 69126, Germany
| | - Heiko Müller
- Corrected Electron Optical Systems GmbH, Englerstr. 28, Heidelberg 69126, Germany
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21
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Afrizal A, Hitch TCA, Viehof A, Treichel N, Riedel T, Abt B, Buhl EM, Kohlheyer D, Overmann J, Clavel T. Anaerobic single-cell dispensing facilitates the cultivation of human gut bacteria. Environ Microbiol 2022; 24:3861-3881. [PMID: 35233904 DOI: 10.1111/1462-2920.15935] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 02/03/2022] [Accepted: 02/08/2022] [Indexed: 12/22/2022]
Abstract
Cultivation via classical agar plate (CAP) approaches is widely used to study microbial communities, but they are time-consuming. An alternative approach is the application of single-cell dispensing (SCD), which allows high-throughput, label-free sorting of microscopic particles. We aimed to develop a new anaerobic SCD workflow to cultivate human gut bacteria and compared it with CAP using faecal communities on three rich culture media. We found that the SCD approach significantly decreased the experimental time to obtain pure cultures from 17 ± 4 to 5 ± 0 days, while the isolate diversity and relative abundance coverage were comparable for both approaches. We further tested the total captured fraction by sequencing the sorted bacteria directly after growth as bulk biomass from 2400 dispensed single cells without downstream identification of individual strains. In this approach, the cultured fraction increased from 35.2% to 52.2% for SCD, highlighting the potential for deeper cultivation projects from single samples. SCD-based cultivation also captured species not detected by sequencing (16 ± 5 per sample, including seven novel taxa). From this work, 82 human gut bacterial species across five phyla (Actinobacteriota, Bacteroidota, Desulfobacterota, Firmicutes and Proteobacteria) and 24 families were obtained, including the first cultured member of 11 novel genera and 10 novel species that were fully characterized taxonomically.
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Affiliation(s)
- Afrizal Afrizal
- Functional Microbiome Research Group, Institute of Medical Microbiology, University Hospital of RWTH Aachen, Aachen, Germany
| | - Thomas C A Hitch
- Functional Microbiome Research Group, Institute of Medical Microbiology, University Hospital of RWTH Aachen, Aachen, Germany
| | - Alina Viehof
- Functional Microbiome Research Group, Institute of Medical Microbiology, University Hospital of RWTH Aachen, Aachen, Germany
| | - Nicole Treichel
- Functional Microbiome Research Group, Institute of Medical Microbiology, University Hospital of RWTH Aachen, Aachen, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
| | - Birte Abt
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
| | - Eva M Buhl
- Electron Microscopy Facility, Institute of Pathology, University Hospital of RWTH Aachen, Aachen, Germany
| | - Dietrich Kohlheyer
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich, Jülich, Germany.,Aachener Verfahrenstechnik (AVT-MSB), RWTH Aachen University, Aachen, Germany
| | - Jörg Overmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany.,Institute of Microbiology, Technical University of Braunschweig, Braunschweig, Germany
| | - Thomas Clavel
- Functional Microbiome Research Group, Institute of Medical Microbiology, University Hospital of RWTH Aachen, Aachen, Germany
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22
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Schmid S, Schiller K, Seitz A, Koll F, Beckert F, Korn P, Lewerich J, Maisch P, Sauter A, Rödel C, Flentje M, Riedel T, Combs S, Zengerling F, Bolenz C, Kübler H, Gschwend J, Retz M. RACE IT - A prospective, single arm, multicenter, phase II-trial to assess safety and efficacy of preoperative RAdiation therapy before radical CystEctomy combined with ImmunoTherapy in locally advanced urothelial carcinoma of the bladder (AB 65/18). Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00417-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Kern M, Riedel T, Breitkreutz J. Investigating key properties of model excipients and binary powder blends using ultrasonic in-die measurements on a compaction simulator. Int J Pharm 2021; 613:121381. [PMID: 34920000 DOI: 10.1016/j.ijpharm.2021.121381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 12/06/2021] [Accepted: 12/09/2021] [Indexed: 11/28/2022]
Abstract
In this work, the recently introduced Kilian Inline Measurement System (KIM) that enables ultrasonic measurements during powder compaction was studied using three pharmaceutical excipients with different properties and particle sizes, applying various amounts of lubricant and different compaction pressures. It was shown that the generated results were highly reproducible, not only in series but also on different days including dismantling and reassembling of the components. The relation between ultrasonic velocity and increasing compact density differed among the investigated materials and was independent of initial particle size and applied maximum pressure. Since the velocity through a porous solid is dependent on pore volume and shape, velocity profiles have the potential to track changes in the microstructures of the materials. Furthermore, ultrasonic velocities through binary mixtures (50:50 (w/w)) at a given solid fraction were between the values of the plain excipients, but more closely resembled one of their components. This may be indicative of the compaction behavior and performance of the blend. Overall, ultrasonic instrumentation seems to be a robust and promising tool for the characterization of powders and blends in compaction processes. However, its practical value must still be investigated further including multi-component blends, underlying densification mechanisms, and decompression.
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Affiliation(s)
- Melinda Kern
- Department of Pharmaceutical Technologies, Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt, Germany; Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany.
| | - Thomas Riedel
- Department of Pharmaceutical Technologies, Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt, Germany
| | - Jörg Breitkreutz
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
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24
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Roelens M, Martin A, Friker B, Sousa FM, Thiabaud A, Vidondo B, Buchter V, Gardiol C, Vonlanthen J, Balmelli C, Battegay M, Berger C, Buettcher M, Cusini A, Flury D, Heininger U, Niederer-Loher A, Riedel T, Schreiber PW, Sommerstein R, Troillet N, Tschudin-Sutter S, Vetter P, Bernhard-Stirnemann S, Corti N, Gaudenz R, Marschall J, Nussbaumer-Ochsner Y, Senn L, Vuichard-Gysin D, Zimmermann P, Zucol F, Iten A, Keiser O. Evolution of COVID-19 mortality over time: results from the Swiss hospital surveillance system (CH-SUR). Swiss Med Wkly 2021; 151:w30105. [PMID: 34843180 DOI: 10.4414/smw.2021.w30105] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND When the periods of time during and after the first wave of the ongoing SARS-CoV-2/COVID-19 pandemic in Europe are compared, the associated COVID-19 mortality seems to have decreased substantially. Various factors could explain this trend, including changes in demographic characteristics of infected persons and the improvement of case management. To date, no study has been performed to investigate the evolution of COVID-19 in-hospital mortality in Switzerland, while also accounting for risk factors. METHODS We investigated the trends in COVID-19-related mortality (in-hospital and in-intermediate/intensive-care) over time in Switzerland, from February 2020 to June 2021, comparing in particular the first and the second wave. We used data from the COVID-19 Hospital-based Surveillance (CH-SUR) database. We performed survival analyses adjusting for well-known risk factors of COVID-19 mortality (age, sex and comorbidities) and accounting for competing risk. RESULTS Our analysis included 16,984 patients recorded in CH-SUR, with 2201 reported deaths due to COVID-19 (13.0%). We found that overall in-hospital mortality was lower during the second wave of COVID-19 than in the first wave (hazard ratio [HR] 0.70, 95% confidence interval [CI] 0.63- 0.78; p <0.001), a decrease apparently not explained by changes in demographic characteristics of patients. In contrast, mortality in intermediate and intensive care significantly increased in the second wave compared with the first wave (HR 1.25, 95% CI 1.05-1.49; p = 0.029), with significant changes in the course of hospitalisation between the first and the second wave. CONCLUSION We found that, in Switzerland, COVID-19 mortality decreased among hospitalised persons, whereas it increased among patients admitted to intermediate or intensive care, when comparing the second wave to the first wave. We put our findings in perspective with changes over time in case management, treatment strategy, hospital burden and non-pharmaceutical interventions. Further analyses of the potential effect of virus variants and of vaccination on mortality would be crucial to have a complete overview of COVID-19 mortality trends throughout the different phases of the pandemic.
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Affiliation(s)
- Maroussia Roelens
- Institute of Global Health, Faculty of Medicine, University of Geneva, Switzerland
| | - Alexis Martin
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Switzerland
| | - Brian Friker
- Veterinary Public Health Institute, University of Bern, Switzerland
| | | | - Amaury Thiabaud
- Institute of Global Health, Faculty of Medicine, University of Geneva, Switzerland
| | - Beatriz Vidondo
- Veterinary Public Health Institute, University of Bern, Switzerland
| | | | - Céline Gardiol
- Swiss Federal Office of Public Health, Bern, Switzerland
| | | | - Carlo Balmelli
- Infection Control Programme, EOC Hospitals, Ticino, Switzerland
| | - Manuel Battegay
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Basel, Switzerland
| | - Christoph Berger
- Division of Infectious Diseases, and Children's Research Centre, University Children's Hospital Zurich, Switzerland
| | - Michael Buettcher
- Paediatric Infectious Diseases, Department of Paediatrics, Children's Hospital, Cantonal Hospital Lucerne, Switzerland
| | - Alexia Cusini
- Department of Infectious Diseases, Cantonal Hospital Graubuenden, Chur, Switzerland
| | - Domenica Flury
- Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital St Gallen, Switzerland
| | - Ulrich Heininger
- Infectious Diseases and Vaccinology, University of Basel Children's Hospital, Basel, Switzerland
| | | | - Thomas Riedel
- Department of Paediatrics, Cantonal Hospital Graubuenden, Chur, Switzerland
| | - Peter W Schreiber
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich and University of Zurich, Switzerland
| | - Rami Sommerstein
- Department of Infectious Diseases, Bern University Hospital (Inselspital), Bern, Switzerland.,Infectious Diseases and Hospital Hygiene Clinic St Anna, Department of Health Sciences and Medicine, University of Lucerne, Switzerland
| | - Nicolas Troillet
- Service of Infectious Diseases, Central Institute, Valais Hospitals, Sion, Switzerland
| | - Sarah Tschudin-Sutter
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Basel, Switzerland
| | - Pauline Vetter
- Geneva Centre for Emerging Viral Diseases, Geneva University Hospitals, Geneva, Switzerland
| | | | - Natascia Corti
- Unit of General Internal Medicine, Hirslanden Clinic, Zurich, Switzerland
| | - Roman Gaudenz
- Internal Medicine and Infectiology, Cantonal Hospital Nidwalden, Stans, Switzerland
| | - Jonas Marschall
- Department of Infectious Diseases, Bern University Hospital (Inselspital), Bern, Switzerland
| | | | - Laurence Senn
- Service of Preventive Medicine, Lausanne University Hospital, CHUV, Lausanne, Switzerland
| | - Danielle Vuichard-Gysin
- Division of Infectious Diseases and Hospital Hygiene, Thurgau Hospital Group Münsterlingen and Frauenfeld, Switzerland
| | - Petra Zimmermann
- Faculty of Science and Medicine, University of Fribourg, Switzerland.,Department of Paediatrics, Fribourg Hospital HFR, Fribourg, Switzerland
| | - Franziska Zucol
- Paediatric Infectious Diseases, Department of Paediatrics, Cantonal Hospital Winterthur, Switzerland
| | - Anne Iten
- Service of Prevention and Infection Control, Directorate of Medicine and Quality, University Hospital Geneva, HUG, Geneva, Switzerland
| | - Olivia Keiser
- Institute of Global Health, Faculty of Medicine, University of Geneva, Switzerland
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25
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Dieckmann AL, Riedel T, Bunk B, Spröer C, Overmann J, Groß U, Bader O, Bohne W, Morgenstern B, Hosseini M, Zautner AE. Genome and Methylome analysis of a phylogenetic novel Campylobacter coli cluster with C. jejuni introgression. Microb Genom 2021; 7. [PMID: 34661518 PMCID: PMC8627207 DOI: 10.1099/mgen.0.000679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The intriguing recent discovery of Campylobacter coli strains, especially of clade 1, that (i) possess mosaic C. coli/C. jejuni alleles, (ii) demonstrate mixed multilocus sequence types (MLSTs) and (iii) have undergone genome-wide introgression has led to the speculation that these two species may be involved in an accelerated rate of horizontal gene transfer that is progressively leading to the merging of both species in a process coined ‘despeciation’. In an MLST-based neighbour-joining tree of a number of C. coli and C. jejuni isolates of different clades, three prominent Campylobacter isolates formed a seemingly separate cluster besides the previously described C. coli and C. jejuni clades. In the light of the suspected, ongoing genetic introgression between the C. coli and C. jejuni species, this cluster of Campylobacter isolates is proposed to present one of the hybrid clonal complexes in the despeciation process of the genus. Specific DNA methylation as well as restriction modification systems are known to be involved in selective uptake of external DNA and their role in such genetic introgression remains to be further investigated. In this study, the phylogeny and DNA methylation of these putative C. coli/C. jejuni hybrid strains were explored, their genomic mosaic structure caused by C. jejuni introgression was demonstrated and basic phenotypic assays were used to characterize these isolates. The genomes of the three hybrid Campylobacter strains were sequenced using PacBio SMRT sequencing, followed by methylome analysis by Restriction-Modification Finder and genome analysis by Parsnp, Smash++ and blast. Additionally, the strains were phenotypically characterized with respect to growth behaviour, motility, eukaryotic cell invasion and adhesion, autoagglutination, biofilm formation, and water survival ability. Our analyses show that the three hybrid Campylobacter strains are clade 1 C. coli strains, which have acquired between 8.1 and 9.1 % of their genome from C. jejuni. The C. jejuni genomic segments acquired are distributed over the entire genome and do not form a coherent cluster. Most of the genes originating from C. jejuni are involved in chemotaxis and motility, membrane transport, cell signalling, or the resistance to toxic compounds such as bile acids. Interspecies gene transfer from C. jejuni has contributed 8.1–9.1% to the genome of three C. coli isolates and initiated the despeciation between C. jejuni and C. coli. Based on their functional annotation, the genes originating from C. jejuni enable the adaptation of the three strains to an intra-intestinal habitat. The transfer of a fused type II restriction-modification system that recognizes the CAYNNNNNCTC/GAGNNNNNRTG motif seems to be the key for the recombination of the C. jejuni genetic material with C. coli genomes.
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Affiliation(s)
- Anastasia-Lisa Dieckmann
- Institut für Medizinische Mikrobiologie und Virologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Thomas Riedel
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany.,Deutsches Zentrum für Infektionsforschung (DZIF) Hannover-Braunschweig, Braunschweig, Germany
| | - Boyke Bunk
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany
| | - Cathrin Spröer
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany
| | - Jörg Overmann
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany.,Deutsches Zentrum für Infektionsforschung (DZIF) Hannover-Braunschweig, Braunschweig, Germany
| | - Uwe Groß
- Institut für Medizinische Mikrobiologie und Virologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Oliver Bader
- Institut für Medizinische Mikrobiologie und Virologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Wolfgang Bohne
- Institut für Medizinische Mikrobiologie und Virologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Burkhard Morgenstern
- Institut für Mikrobiologie und Genetik, Abteilung Bioinformatik, Universität Göttingen, Göttingen, Germany
| | - Morteza Hosseini
- Institut für Mikrobiologie und Genetik, Abteilung Bioinformatik, Universität Göttingen, Göttingen, Germany.,IEETA/DETI, University of Aveiro, Aveiro, Portugal
| | - Andreas E Zautner
- Institut für Medizinische Mikrobiologie und Virologie, Universitätsmedizin Göttingen, Göttingen, Germany
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26
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Kopf A, Bunk B, Coldewey SM, Gunzer F, Riedel T, Schröttner P. Identification and Antibiotic Profiling of Wohlfahrtiimonas chitiniclastica, an Underestimated Human Pathogen. Front Microbiol 2021; 12:712775. [PMID: 34630346 PMCID: PMC8496446 DOI: 10.3389/fmicb.2021.712775] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 08/27/2021] [Indexed: 12/13/2022] Open
Abstract
In the past 12 years, several case reports have clearly demonstrated that Wohlfahrtiimonas chitiniclastica is capable of causing sepsis and bacteremia in humans. However, since most clinicians are not familiar with this species, little is known about its pathogenicity and treatment options while it is as rare but underestimated human pathogen. Therefore, a larger strain collection is required so that methods can be identified that are most suitable to obtain rapid and reliable identification. Moreover, the antimicrobial resistance profile needs to be elucidated in order to explore possible treatment options. Over a period of 6 years, we therefore have collected a total of 14 W. chitiniclastica isolates in routine diagnostics, which now served as the basis for a comprehensive characterization with respect to identification and antibiotic profiling. We compared the accuracy and convenience of several identification techniques in which MALDI-TOF MS and sequencing of the 16S rRNA gene have proven to be suitable for identification of W. chitiniclastica. In addition, whole genome sequencing (WGS)-based digital DNA-DNA hybridization (dDDH) was used as a reference method for strain identification, and surprised with the detection of a novel W. chitiniclastica subspecies. A combination of in silico and in vitro analyses revealed a first insight into the antimicrobial resistance profile and the molecular basis of antimicrobial resistance. Based on our findings, trimethoprim/sulfamethoxazole, levofloxacin, and cephalosporins (e.g., ceftazidime) may be the best antibiotics to use in order to treat infections caused by W. chitiniclastica, while resistance to fosfomycin, amikacin and tobramycin is observed.
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Affiliation(s)
- Anna Kopf
- Institute of Medical Microbiology and Virology, University Hospital Carl Gustav Carus, Dresden, Germany
| | - Boyke Bunk
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany
| | - Sina M Coldewey
- Clinic for Anaesthesiology and Intensive Care Medicine, Jena University Hospital, Jena, Germany.,Septomics Research Center, Jena University Hospital, Jena, Germany
| | - Florian Gunzer
- Department of Hospital Infection Control, University Hospital Carl Gustav Carus, Dresden, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Percy Schröttner
- Institute of Medical Microbiology and Virology, University Hospital Carl Gustav Carus, Dresden, Germany
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27
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Adams M, Schulzke SM, Natalucci G, Schneider J, Riedel T, Tolsa CB, Pfister R, Bassler D. Outcomes for Infants Born in Perinatal Centers Performing Fewer Surgical Ligations for Patent Ductus Arteriosus: A Swiss Population-Based Study. J Pediatr 2021; 237:213-220.e2. [PMID: 34157348 DOI: 10.1016/j.jpeds.2021.06.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 06/09/2021] [Accepted: 06/15/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To assess patent ductus arteriosus treatment variation between Swiss perinatal centers and to determine its effect on outcome in a population-based setting. STUDY DESIGN This was a retrospective cohort study of infants born less than 28 weeks of gestation between 2012 and 2017. Outcomes between surgically ligated and pharmacologically treated infants as well as infants born in centers performing ≤10% ligation ("low" group) and >10% ("high" group) were compared using logistic regression and 1:1 propensity score matching. Matching was based on case-mix and preligation confounders: intraventricular hemorrhages grades 3-4, necrotizing enterocolitis, sepsis, and ≥28 days' oxygen supply. RESULTS Of 1389 infants, 722 (52%) had pharmacologic treatment and 156 (11.2%) received surgical ligation. Compared with infants who received pharmacologic treatment, ligated infants had greater odds for major morbidities (OR 2.09, 95% CI 1.44-3.04) and 2-year neurodevelopmental impairment (OR 1.81, 95% CI 1.15-2.84). Mortality was comparable after restricting the cohort to infants surviving at least until day 10 to avoid survival bias. In the "low" group, 34 (4.9%) of 696 infants were ligated compared with 122 (17.6%) of 693 infants in the "high" group. Infants in the "high" group had greater odds for major morbidities (OR 1.49, 95% CI 1.11-2.0). CONCLUSIONS Our analysis identified a burden on infants receiving surgical ligation vs pharmacologic treatment in a population-based setting where there was no agreed-on common procedure. These results may guide a revision of patent ductus arteriosus treatment practice in Switzerland.
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Affiliation(s)
- Mark Adams
- Newborn Research, Department of Neonatology, University of Zurich and University Hospital Zurich, Zurich, Switzerland; Swiss Neonatal Network & Follow-up Group, Zurich, Switzerland.
| | - Sven M Schulzke
- Department of Neonatology, University Children's Hospital Basel (UKBB), Basel, Switzerland
| | - Giancarlo Natalucci
- Newborn Research, Department of Neonatology, University of Zurich and University Hospital Zurich, Zurich, Switzerland; Swiss Neonatal Network & Follow-up Group, Zurich, Switzerland; Larsson-Rosenquist Centre for Neurodevelopment, Growth and Nutrition of the Newborn, University of Zurich and University Hospital Zurich, Zurich, Switzerland
| | - Juliane Schneider
- Clinic of Neonatology, Department Woman-Mother-Child, University Hospital Lausanne, Lausanne, Switzerland
| | - Thomas Riedel
- Paediatric and Neonatal Intensive Care Unit, Department of Paediatrics, Cantonal Hospital Graubuenden, Chur, Switzerland
| | | | - Riccardo Pfister
- Department of Woman, Child and Adolescent, Geneva University Hospital, Geneva, Switzerland
| | - Dirk Bassler
- Newborn Research, Department of Neonatology, University of Zurich and University Hospital Zurich, Zurich, Switzerland
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28
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Riedel T, Neumann-Schaal M, Wittmann J, Schober I, Hofmann JD, Lu CW, Dannheim A, Zimmermann O, Lochner M, Groß U, Overmann J. Characterization of Clostridioides difficile DSM 101085 with A-B-CDT+ Phenotype from a Late Recurrent Colonization. Genome Biol Evol 2021; 12:566-577. [PMID: 32302381 PMCID: PMC7250501 DOI: 10.1093/gbe/evaa072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/10/2020] [Indexed: 12/29/2022] Open
Abstract
During the last decades, hypervirulent strains of Clostridioides difficile with frequent disease recurrence and increased mortality appeared. Clostridioides difficile DSM 101085 was isolated from a patient who suffered from several recurrent infections and colonizations, likely contributing to a fatal outcome. Analysis of the toxin repertoire revealed the presence of a complete binary toxin locus and an atypical pathogenicity locus consisting of only a tcdA pseudogene and a disrupted tcdC gene sequence. The pathogenicity locus shows upstream a transposon and has been subject to homologous recombination or lateral gene transfer events. Matching the results of the genome analysis, neither TcdA nor TcdB production but the expression of cdtA and cdtB was detected. This highlights a potential role of the binary toxin C. difficile toxin in this recurrent colonization and possibly further in a host-dependent virulence. Compared with the C. difficile metabolic model strains DSM 28645 (630Δerm) and DSM 27147 (R20291), strain DSM 101085 showed a specific metabolic profile, featuring changes in the threonine degradation pathways and alterations in the central carbon metabolism. Moreover, products originating from Stickland pathways processing leucine, aromatic amino acids, and methionine were more abundant in strain DSM 101085, indicating a more efficient use of these substrates. The particular characteristics of strain C. difficile DSM 101085 may represent an adaptation to a low-protein diet in a patient with recurrent infections.
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Affiliation(s)
- Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Meina Neumann-Schaal
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,Department of Bioinformatics and Biochemistry and Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Germany
| | - Johannes Wittmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Isabel Schober
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Julia Danielle Hofmann
- Department of Bioinformatics and Biochemistry and Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Germany
| | - Chia-Wen Lu
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, a Joint Venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Antonia Dannheim
- Department of Bioinformatics and Biochemistry and Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Germany
| | - Ortrud Zimmermann
- Institute of Medical Microbiology, University Medical Center Göttingen, Germany
| | - Matthias Lochner
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, a Joint Venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Uwe Groß
- Institute of Medical Microbiology, University Medical Center Göttingen, Germany.,Göttingen International Health Network, Göttingen, Germany
| | - Jörg Overmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany.,Institute of Microbiology, Technical University of Braunschweig, Germany
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29
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Hitch TCA, Riedel T, Oren A, Overmann J, Lawley TD, Clavel T. Automated analysis of genomic sequences facilitates high-throughput and comprehensive description of bacteria. ISME Commun 2021; 1:16. [PMID: 36732617 PMCID: PMC9723785 DOI: 10.1038/s43705-021-00017-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/21/2021] [Accepted: 05/04/2021] [Indexed: 02/05/2023]
Abstract
The study of microbial communities is hampered by the large fraction of still unknown bacteria. However, many of these species have been isolated, yet lack a validly published name or description. The validation of names for novel bacteria requires that the uniqueness of those taxa is demonstrated and their properties are described. The accepted format for this is the protologue, which can be time-consuming to create. Hence, many research fields in microbiology and biotechnology will greatly benefit from new approaches that reduce the workload and harmonise the generation of protologues.We have developed Protologger, a bioinformatic tool that automatically generates all the necessary readouts for writing a detailed protologue. By producing multiple taxonomic outputs, functional features and ecological analysis using the 16S rRNA gene and genome sequences from a single species, the time needed to gather the information for describing novel taxa is substantially reduced. The usefulness of Protologger was demonstrated by using three published isolate collections to describe 34 novel taxa, encompassing 17 novel species and 17 novel genera, including the automatic generation of ecologically and functionally relevant names. We also highlight the need to utilise multiple taxonomic delineation methods, as while inconsistencies between each method occur, a combined approach provides robust placement. Protologger is open source; all scripts and datasets are available, along with a webserver at www.protologger.de.
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Affiliation(s)
- Thomas C A Hitch
- Functional Microbiome Research Group, RWTH University Hospital, Aachen, Germany.
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
| | - Aharon Oren
- The Institute of Life Sciences, The Hebrew University of Jerusalem, The Edmond J. Safra Campus, Jerusalem, Israel
| | - Jörg Overmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
- Braunschweig University of Technology, Braunschweig, Germany
| | - Trevor D Lawley
- Host-Microbiota Interactions Laboratory, Wellcome Sanger Institute, Hinxton, UK
| | - Thomas Clavel
- Functional Microbiome Research Group, RWTH University Hospital, Aachen, Germany.
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30
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Borghesi A, Trück J, Asgari S, Sancho-Shimizu V, Agyeman PKA, Bellos E, Giannoni E, Stocker M, Posfay-Barbe KM, Heininger U, Bernhard-Stirnemann S, Niederer-Loher A, Kahlert CR, Natalucci G, Relly C, Riedel T, Kuehni CE, Thorball CW, Chaturvedi N, Martinon-Torres F, Kuijpers TW, Coin L, Wright V, Herberg J, Levin M, Aebi C, Berger C, Fellay J, Schlapbach LJ. Whole-exome Sequencing for the Identification of Rare Variants in Primary Immunodeficiency Genes in Children With Sepsis: A Prospective, Population-based Cohort Study. Clin Infect Dis 2021; 71:e614-e623. [PMID: 32185379 PMCID: PMC7744985 DOI: 10.1093/cid/ciaa290] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 03/15/2020] [Indexed: 11/15/2022] Open
Abstract
Background The role of primary immunodeficiencies (PID) in susceptibility to sepsis remains unknown. It is unclear whether children with sepsis benefit from genetic investigations. We hypothesized that sepsis may represent the first manifestation of underlying PID. We applied whole-exome sequencing (WES) to a national cohort of children with sepsis to identify rare, predicted pathogenic variants in PID genes. Methods We conducted a multicenter, population-based, prospective study including previously healthy children aged ≥28 days and <17 years admitted with blood culture-proven sepsis. Using a stringent variant filtering procedure, analysis of WES data was restricted to rare, predicted pathogenic variants in 240 PID genes for which increased susceptibility to bacterial infection has been reported. Results There were 176 children presenting with 185 sepsis episodes who underwent WES (median age, 52 months; interquartile range, 15.4–126.4). There were 41 unique predicted pathogenic PID variants (1 homozygous, 5 hemizygous, and 35 heterozygous) found in 35/176 (20%) patients, including 3/176 (2%) patients carrying variants that were previously reported to lead to PID. The variants occurred in PID genes across all 8 PID categories, as defined by the International Union of Immunological Societies. We did not observe a significant correlation between clinical or laboratory characteristics of patients and the presence or absence of PID variants. Conclusions Applying WES to a population-based cohort of previously healthy children with bacterial sepsis detected variants of uncertain significance in PID genes in 1 out of 5 children. Future studies need to investigate the functional relevance of these variants to determine whether variants in PID genes contribute to pediatric sepsis susceptibility.
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Affiliation(s)
- Alessandro Borghesi
- Swiss Institute of Bioinformatics, Lausanne, Switzerland.,Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Neonatal Intensive Care Unit, Fondazione Institute for Research, Hospitalization and Health Care (IRCCS) Policlinico San Matteo, Pavia, Italy
| | - Johannes Trück
- University Children's Hospital Zurich and the Children's Research Center, Zurich, Switzerland.,University of Zurich, Zurich, Switzerland
| | - Samira Asgari
- Swiss Institute of Bioinformatics, Lausanne, Switzerland.,Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Division of Genetics and Rheumatology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Program in Medical and Population Genetics, Broad Institute of Harvard and MIT, Cambridge, Massachusetts, USA
| | - Vanessa Sancho-Shimizu
- Section of Paediatrics, Imperial College London, London, United Kingdom.,Section of Virology, Imperial College London, London, United Kingdom
| | - Philipp K A Agyeman
- Department of Paediatrics, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Evangelos Bellos
- Section of Paediatrics, Imperial College London, London, United Kingdom
| | - Eric Giannoni
- Service of Neonatology, Department Woman-Mother-Child, and Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, Lausanne, Switzerland
| | - Martin Stocker
- Department of Paediatrics, Children's Hospital Lucerne, Lucerne, Switzerland
| | - Klara M Posfay-Barbe
- Paediatric Infectious Diseases Unit, Children's Hospital of Geneva, University Hospitals of Geneva, Geneva, Switzerland
| | - Ulrich Heininger
- Infectious Diseases and Vaccinology, University of Basel Children's Hospital, Basel, Switzerland
| | | | | | | | | | - Christa Relly
- University Children's Hospital Zurich and the Children's Research Center, Zurich, Switzerland
| | - Thomas Riedel
- Department of Paediatrics, Cantonal Hospital Graubuenden, Chur, Switzerland
| | - Claudia E Kuehni
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Christian W Thorball
- Swiss Institute of Bioinformatics, Lausanne, Switzerland.,Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Nimisha Chaturvedi
- Swiss Institute of Bioinformatics, Lausanne, Switzerland.,Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Federico Martinon-Torres
- Translational Paediatrics and Infectious Diseases Section, Paediatrics Department, Santiago de Compostela, Spain.,Instituto de Investigación Sanitaria de Santiago, Genetics, Vaccines, Infectious Diseases and Paediatrics Research Group, Santiago de Compostela, Spain
| | - Taco W Kuijpers
- Academic Medical Center, Emma Children's Hospital, University of Amsterdam, Amsterdam, The Netherlands
| | - Lachlan Coin
- Institute of Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Victoria Wright
- Section of Paediatrics, Imperial College London, London, United Kingdom
| | - Jethro Herberg
- Section of Paediatrics, Imperial College London, London, United Kingdom
| | - Michael Levin
- Section of Paediatrics, Imperial College London, London, United Kingdom
| | - Christoph Aebi
- Department of Paediatrics, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Christoph Berger
- University Children's Hospital Zurich and the Children's Research Center, Zurich, Switzerland
| | - Jacques Fellay
- Swiss Institute of Bioinformatics, Lausanne, Switzerland.,Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Precision Medicine Unit, Lausanne University Hospital, Lausanne, Switzerland
| | - Luregn J Schlapbach
- University Children's Hospital Zurich and the Children's Research Center, Zurich, Switzerland.,Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, Brisbane, Australia.,Paediatric Intensive Care Unit, Queensland Children's Hospital, Children's Health Queensland, Brisbane, Australia
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31
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Hitch TCA, Afrizal A, Riedel T, Kioukis A, Haller D, Lagkouvardos I, Overmann J, Clavel T. Recent advances in culture-based gut microbiome research. Int J Med Microbiol 2021; 311:151485. [PMID: 33689954 DOI: 10.1016/j.ijmm.2021.151485] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 01/15/2021] [Accepted: 02/23/2021] [Indexed: 12/16/2022] Open
Abstract
Gut microbes affect the physiology of their hosts. Studying their diversity and functions is thus of utmost importance as it will open new avenues towards the discovery of new biomolecules and the treatment of diseases. Gut microbiome research is currently boosted by the unification of metagenomics, which has dominated the field in the last two decades, and cultivation, which is experiencing a renaissance. Each of these approaches has advantages and drawbacks that can be overcome if used synergistically. In this brief article, we summarize recent literature and own studies on the cultivation of gut microbes, provide a succinct status quo of cultured fractions and collections of isolates, and give short opinions on challenges and next steps to take.
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Affiliation(s)
- Thomas C A Hitch
- Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Afrizal Afrizal
- Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany; German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
| | - Antonios Kioukis
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, Greece
| | - Dirk Haller
- ZIEL Institute for Food and Health, Technical University of Munich, Freising, Germany
| | - Ilias Lagkouvardos
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, Greece; ZIEL Institute for Food and Health, Technical University of Munich, Freising, Germany
| | - Jörg Overmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany; German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
| | - Thomas Clavel
- Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany; ZIEL Institute for Food and Health, Technical University of Munich, Freising, Germany.
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32
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Thiabaud A, Iten A, Balmelli C, Senn L, Troillet N, Widmer A, Flury D, Schreiber PW, Vázquez M, Damonti L, Buettcher M, Vuichard-Gysin D, Kuhm C, Cusini A, Riedel T, Nussbaumer-Ochsner Y, Gaudenz R, Heininger U, Berger C, Zucol F, Bernhard-Stirnemann S, Corti N, Zimmermann P, Uka A, Niederer-Loher A, Gardiol C, Roelens M, Keiser O. Cohort profile: SARS-CoV-2/COVID-19 hospitalised patients in Switzerland. Swiss Med Wkly 2021; 151:w20475. [PMID: 33638351 DOI: 10.4414/smw.2021.20475] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND SARS-CoV-2/COVID-19, which emerged in China in late 2019, rapidly spread across the world with several million victims in 213 countries. Switzerland was severely hit by the virus, with 43,000 confirmed cases as of 1 September 2020. AIM In cooperation with the Federal Office of Public Health, we set up a surveillance database in February 2020 to monitor hospitalised patients with COVID-19, in addition to their mandatory reporting system. METHODS Patients hospitalised for more than 24 hours with a positive polymerase chain-reaction test, from 20 Swiss hospitals, are included. Data were collected in a customised case report form based on World Health Organisation recommendations and adapted to local needs. Nosocomial infections were defined as infections for which the onset of symptoms was more than 5 days after the patient’s admission date. RESULTS As of 1 September 2020, 3645 patients were included. Most patients were male (2168, 59.5%), and aged between 50 and 89 years (2778, 76.2%), with a median age of 68 (interquartile range 54–79). Community infections dominated with 3249 (89.0%) reports. Comorbidities were frequently reported, with hypertension (1481, 61.7%), cardiovascular diseases (948, 39.5%) and diabetes (660, 27.5%) being the most frequent in adults; respiratory diseases and asthma (4, 21.1%), haematological and oncological diseases (3, 15.8%) were the most frequent in children. Complications occurred in 2679 (73.4%) episodes, mostly respiratory diseases (2470, 93.2% in adults; 16, 55.2% in children), and renal (681, 25.7%) and cardiac (631, 23.8%) complications for adults. The second and third most frequent complications in children affected the digestive system and the liver (7, 24.1%). A targeted treatment was given in 1299 (35.6%) episodes, mostly with hydroxychloroquine (989, 76.1%). Intensive care units stays were reported in 578 (15.8%) episodes. A total of 527 (14.5%) deaths were registered, all among adults. CONCLUSION The surveillance system has been successfully initiated and provides a robust set of data for Switzerland by including about 80% (compared with official statistics) of SARS-CoV-2/COVID-19 hospitalised patients, with similar age and comorbidity distributions. It adds detailed information on the epidemiology, risk factors and clinical course of these cases and, therefore, is a valuable addition to the existing mandatory reporting.
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Affiliation(s)
- Amaury Thiabaud
- Institut de Santé Globale, Faculté de Médecine de l'Université de Genève, Geneva, Switzerland
| | - Anne Iten
- Service de prévention et contrôle de l'infection, Direction médicale et qualité, HUG, Geneva, Switzerland
| | - Carlo Balmelli
- Infection Control Programme, EOC Hospitals, Ticino, Switzerland
| | - Laurence Senn
- Service de médecine préventive hospitalière, CHUV, Lausanne, Switzerland
| | - Nicolas Troillet
- Service of Infectious Diseases, Central Institute, Valais Hospitals, Sion, Switzerland
| | - Andreas Widmer
- Department of Infectious Diseases, University Hospital Basel, Switzerland
| | - Domenica Flury
- Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital St Gallen, Switzerland
| | - Peter W Schreiber
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich and University of Zurich, Switzerland
| | - Miriam Vázquez
- Department of Infectious Diseases, Bern University Hospital (Inselspital), Bern, Switzerland
| | - Lauro Damonti
- Department of Infectious Diseases, Bern University Hospital (Inselspital), Bern, Switzerland
| | - Michael Buettcher
- Paediatric Infectious Diseases, Department of Paediatrics, Children's Hospital, Cantonal Hospital Lucerne, Switzerland
| | | | - Christoph Kuhm
- Department of Infectious Diseases, Thurgau Cantonal Hospital, Thurgau, Switzerland
| | - Alexia Cusini
- Department of Infectious Diseases, Cantonal Hospital Graubuenden, Chur, Switzerland
| | - Thomas Riedel
- Department of Paediatrics, Cantonal Hospital Graubuenden, Chur, Switzerland
| | | | - Roman Gaudenz
- Innere Medizin und Infektiologie, Kantonsspital Nidwalden, Stans, Switzerland
| | - Ulrich Heininger
- Infectious Diseases and Vaccinology, University of Basel Children's Hospital, Basel, Switzerland
| | - Christoph Berger
- Division of Infectious Diseases and Children's Research Centre, University Children's Hospital Zurich, Switzerland
| | - Franziska Zucol
- Paediatric Infectious Diseases, Department of Paediatrics, Cantonal Hospital Winterthur, Switzerland
| | | | - Natascia Corti
- Unit of General Internal Medicine, Hirslanden Clinic, Zurich, Switzerland
| | - Petra Zimmermann
- Faculty of Science and Medicine, University of Fribourg, Switzerland / Department of Paediatrics, Fribourg Hospital HFR, Fribourg, Switzerland
| | - Anita Uka
- Faculty of Science and Medicine, University of Fribourg, Switzerland / Department of Paediatrics, Fribourg Hospital HFR, Fribourg, Switzerland
| | | | - Céline Gardiol
- Swiss Federal Office of Public Health, Bern, Switzerland
| | - Maroussia Roelens
- Institut de Santé Globale, Faculté de Médecine de l'Université de Genève, Geneva, Switzerland
| | - Olivia Keiser
- Institut de Santé Globale, Faculté de Médecine de l'Université de Genève, Geneva, Switzerland
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33
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Matthias J, Heink S, Picard F, Zeiträg J, Kolz A, Chao YY, Soll D, de Almeida GP, Glasmacher E, Jacobsen ID, Riedel T, Peters A, Floess S, Huehn J, Baumjohann D, Huber M, Korn T, Zielinski CE. Salt generates antiinflammatory Th17 cells but amplifies pathogenicity in proinflammatory cytokine microenvironments. J Clin Invest 2021; 130:4587-4600. [PMID: 32484796 DOI: 10.1172/jci137786] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 05/14/2020] [Indexed: 12/16/2022] Open
Abstract
Th cells integrate signals from their microenvironment to acquire distinct specialization programs for efficient clearance of diverse pathogens or for immunotolerance. Ionic signals have recently been demonstrated to affect T cell polarization and function. Sodium chloride (NaCl) was proposed to accumulate in peripheral tissues upon dietary intake and to promote autoimmunity via the Th17 cell axis. Here, we demonstrate that high-NaCl conditions induced a stable, pathogen-specific, antiinflammatory Th17 cell fate in human T cells in vitro. The p38/MAPK pathway, involving NFAT5 and SGK1, regulated FoxP3 and IL-17A expression in high-NaCl conditions. The NaCl-induced acquisition of an antiinflammatory Th17 cell fate was confirmed in vivo in an experimental autoimmune encephalomyelitis (EAE) mouse model, which demonstrated strongly reduced disease symptoms upon transfer of T cells polarized in high-NaCl conditions. However, NaCl was coopted to promote murine and human Th17 cell pathogenicity, if T cell stimulation occurred in a proinflammatory and TGF-β-low cytokine microenvironment. Taken together, our findings reveal a context-dependent, dichotomous role for NaCl in shaping Th17 cell pathogenicity. NaCl might therefore prove beneficial for the treatment of chronic inflammatory diseases in combination with cytokine-blocking drugs.
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Affiliation(s)
- Julia Matthias
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany.,Department of Cellular Immunoregulation, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Sylvia Heink
- Klinikum rechts der Isar, Department of Experimental Neuroimmunology, Technical University of Munich, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Felix Picard
- Institute for Medical Microbiology and Hygiene, University of Marburg, Marburg, Germany
| | - Julia Zeiträg
- Institute for Immunology, Biomedical Center, Faculty of Medicine, Ludwig Maximilian University of Munich (LMU Munich), Planegg-Martinsried, Germany
| | - Anna Kolz
- Institute of Clinical Neuroimmunology, Hospital and Biomedical Center of LMU Munich, Planegg-Martinsried, Germany
| | - Ying-Yin Chao
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany.,TranslaTUM, Technical University of Munich, Munich, Germany
| | - Dominik Soll
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany
| | - Gustavo P de Almeida
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany.,TranslaTUM, Technical University of Munich, Munich, Germany
| | - Elke Glasmacher
- Roche Innovation Center Munich, pRED, Large Molecule Research, Penzberg, Germany
| | - Ilse D Jacobsen
- Research Group Microbial Immunology, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute, Jena, Germany.,Institute of Microbiology, Friedrich Schiller University, Jena, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig and German Center for Infection Research, Partner Site Hannover-Braunschweig, Hannover-Braunschweig, Germany
| | - Anneli Peters
- Institute of Clinical Neuroimmunology, Hospital and Biomedical Center of LMU Munich, Planegg-Martinsried, Germany
| | - Stefan Floess
- Department of Experimental Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Jochen Huehn
- Department of Experimental Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Dirk Baumjohann
- Institute for Immunology, Biomedical Center, Faculty of Medicine, Ludwig Maximilian University of Munich (LMU Munich), Planegg-Martinsried, Germany
| | - Magdalena Huber
- Institute for Medical Microbiology and Hygiene, University of Marburg, Marburg, Germany
| | - Thomas Korn
- Klinikum rechts der Isar, Department of Experimental Neuroimmunology, Technical University of Munich, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Christina E Zielinski
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany.,Department of Cellular Immunoregulation, Charité - Universitätsmedizin Berlin, Berlin, Germany.,TranslaTUM, Technical University of Munich, Munich, Germany
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34
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Rasmussen TS, Streidl T, Hitch TCA, Wortmann E, Deptula P, Kofoed MVW, Riedel T, Neumann-Schaal M, Hansen M, Nielsen DS, Clavel T, Vogensen FK. Sporofaciens musculi gen. nov., sp. nov., a novel bacterium isolated from the caecum of an obese mouse. Int J Syst Evol Microbiol 2021; 71. [PMID: 33512312 DOI: 10.1099/ijsem.0.004673] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
A bacterial strain, designated WCA-9-b2T, was isolated from the caecal content of an 18-week-old obese C57BL/6NTac male mouse. According to phenotypic analyses, the isolate was rod-shaped, strictly anaerobic, spore-forming, non-motile and Gram-stain-positive, under the conditions tested. Colonies were irregular and non-pigmented. Analysis of the 16S rRNA gene sequence indicated that the isolate belonged to the order Clostridiales with Dorea longicatena ATCC 27755T (94.9 % sequence identity), Ruminococcus gnavus ATCC 29149T (94.8%) and Clostridium scindens ATCC 35704T (94.3%) being the closest relatives. Whole genome sequencing showed an average nucleotide identity <74.23 %, average amino acid identity <64.52-74.67 % and percentage of conserved proteins values <50 % against the nine closest relatives (D. longicatena, Ruminococcus gnavus, C. scindens, Dorea formicigenerans, Ruminococcus lactaris, Clostridium hylemonae, Merdimonas faecis, Faecalicatena contorta and Faecalicatena fissicatena). The genome-based G+C content of genomic DNA was 44.4 mol%. The major cellular fatty acids were C16 : 0 (24.5%), C18 : 1 cis9 (19.8 %), C16 : 0 DMA (11.7%), C18 : 0 (8.4%) and C14 : 0 (6.6%). Respiratory quinones were not detected. The predominant metabolic end products of glucose fermentation were acetate and succinate. Production of CO2 and H2 were detected. Based on these data, we propose that strain WCA-9-b2T represents a novel species within a novel genus, for which the name Sporofaciens musculi gen. nov., sp. nov. is proposed. The type strain is WCA-9-b2T (=DSM 106039T=CECT 30156T).
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Affiliation(s)
- Torben Sølbeck Rasmussen
- Section of Microbiology and Fermentation, Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
| | - Theresa Streidl
- Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Thomas C A Hitch
- Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Esther Wortmann
- Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Paulina Deptula
- Section of Microbiology and Fermentation, Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
| | - Michael V W Kofoed
- Microbial Conversion Technologies Research Group, Section for Biological and Chemical Engineering, Department of Engineering, Aarhus University, Aarhus, Denmark
| | - Thomas Riedel
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Meina Neumann-Schaal
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Michael Hansen
- Center for Advanced Bioimaging, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Dennis Sandris Nielsen
- Section of Microbiology and Fermentation, Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
| | - Thomas Clavel
- ZIEL Core Facility Microbiome, Technical University of Munich, Freising, Germany.,Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Finn Kvist Vogensen
- Section of Microbiology and Fermentation, Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
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35
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Wylensek D, Hitch TCA, Riedel T, Afrizal A, Kumar N, Wortmann E, Liu T, Devendran S, Lesker TR, Hernández SB, Heine V, Buhl EM, M D'Agostino P, Cumbo F, Fischöder T, Wyschkon M, Looft T, Parreira VR, Abt B, Doden HL, Ly L, Alves JMP, Reichlin M, Flisikowski K, Suarez LN, Neumann AP, Suen G, de Wouters T, Rohn S, Lagkouvardos I, Allen-Vercoe E, Spröer C, Bunk B, Taverne-Thiele AJ, Giesbers M, Wells JM, Neuhaus K, Schnieke A, Cava F, Segata N, Elling L, Strowig T, Ridlon JM, Gulder TAM, Overmann J, Clavel T. A collection of bacterial isolates from the pig intestine reveals functional and taxonomic diversity. Nat Commun 2020; 11:6389. [PMID: 33319778 PMCID: PMC7738495 DOI: 10.1038/s41467-020-19929-w] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 11/02/2020] [Indexed: 02/08/2023] Open
Abstract
Our knowledge about the gut microbiota of pigs is still scarce, despite the importance of these animals for biomedical research and agriculture. Here, we present a collection of cultured bacteria from the pig gut, including 110 species across 40 families and nine phyla. We provide taxonomic descriptions for 22 novel species and 16 genera. Meta-analysis of 16S rRNA amplicon sequence data and metagenome-assembled genomes reveal prevalent and pig-specific species within Lactobacillus, Streptococcus, Clostridium, Desulfovibrio, Enterococcus, Fusobacterium, and several new genera described in this study. Potentially interesting functions discovered in these organisms include a fucosyltransferase encoded in the genome of the novel species Clostridium porci, and prevalent gene clusters for biosynthesis of sactipeptide-like peptides. Many strains deconjugate primary bile acids in in vitro assays, and a Clostridium scindens strain produces secondary bile acids via dehydroxylation. In addition, cells of the novel species Bullifex porci are coccoidal or spherical under the culture conditions tested, in contrast with the usual helical shape of other members of the family Spirochaetaceae. The strain collection, called ‘Pig intestinal bacterial collection’ (PiBAC), is publicly available at www.dsmz.de/pibac and opens new avenues for functional studies of the pig gut microbiota. The authors present a public collection of 117 bacterial isolates from the pig gut, including the description of 38 novel taxa. Interesting functions discovered in these organisms include a new fucosyltransferease and sactipeptide-like molecules encoded by biosynthetic gene clusters.
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Affiliation(s)
- David Wylensek
- Functional Microbiome Research Group, RWTH University Hospital, Aachen, Germany
| | - Thomas C A Hitch
- Functional Microbiome Research Group, RWTH University Hospital, Aachen, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
| | - Afrizal Afrizal
- Functional Microbiome Research Group, RWTH University Hospital, Aachen, Germany
| | - Neeraj Kumar
- Functional Microbiome Research Group, RWTH University Hospital, Aachen, Germany.,ZIEL - Institute for Food & Health, Technical University of Munich, Freising, Germany
| | - Esther Wortmann
- Functional Microbiome Research Group, RWTH University Hospital, Aachen, Germany
| | - Tianzhe Liu
- Chair of Technical Biochemistry, Technical University of Dresden, Dresden, Germany
| | - Saravanan Devendran
- Microbiome Metabolic Engineering Theme, Carl R. Woese Institute for Genomic Biology, Urbana, IL, USA.,Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Till R Lesker
- Department of Microbial Immune Regulation, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Sara B Hernández
- Laboratory for Molecular Infection Medicine Sweden (MIMS), Department of Molecular Biology, Umeå University, Umeå, Sweden
| | - Viktoria Heine
- Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | - Eva M Buhl
- Electron Microscopy Facility, Institute of Pathology, RWTH University Hospital, Aachen, Germany
| | - Paul M D'Agostino
- Chair of Technical Biochemistry, Technical University of Dresden, Dresden, Germany
| | - Fabio Cumbo
- Department CIBIO, University of Trento, Trento, Italy
| | - Thomas Fischöder
- Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | - Marzena Wyschkon
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
| | - Torey Looft
- National Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Ames, IA, USA
| | - Valeria R Parreira
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Canada
| | - Birte Abt
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
| | - Heidi L Doden
- Microbiome Metabolic Engineering Theme, Carl R. Woese Institute for Genomic Biology, Urbana, IL, USA.,Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Lindsey Ly
- Microbiome Metabolic Engineering Theme, Carl R. Woese Institute for Genomic Biology, Urbana, IL, USA.,Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - João M P Alves
- Department of Parasitology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Krzysztof Flisikowski
- Chair of Livestock Biotechnology, Weihenstephan School of Life Science, Technical University of Munich, Freising, Germany
| | - Laura Navarro Suarez
- Institute of Food Chemistry, Hamburg School of Food Science, University of Hamburg, Hamburg, Germany
| | - Anthony P Neumann
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, USA
| | - Garret Suen
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, USA
| | | | - Sascha Rohn
- Institute of Food Chemistry, Hamburg School of Food Science, University of Hamburg, Hamburg, Germany.,Institute of Food Technolgy and Food Chemistry, Technische Universität Berlin, Berlin, Germany
| | - Ilias Lagkouvardos
- ZIEL - Institute for Food & Health, Technical University of Munich, Freising, Germany.,Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Center of Marine Research, Heraklion, Greece
| | - Emma Allen-Vercoe
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Canada
| | - Cathrin Spröer
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Boyke Bunk
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Anja J Taverne-Thiele
- Host-Microbe Interactomics Group, Department of Animal Science, Wageningen University, Wageningen, The Netherlands
| | - Marcel Giesbers
- Electron Microscopy Center, Wageningen University, Wageningen, The Netherlands
| | - Jerry M Wells
- Host-Microbe Interactomics Group, Department of Animal Science, Wageningen University, Wageningen, The Netherlands
| | - Klaus Neuhaus
- ZIEL - Institute for Food & Health, Technical University of Munich, Freising, Germany
| | - Angelika Schnieke
- ZIEL - Institute for Food & Health, Technical University of Munich, Freising, Germany.,Chair of Livestock Biotechnology, Weihenstephan School of Life Science, Technical University of Munich, Freising, Germany
| | - Felipe Cava
- Laboratory for Molecular Infection Medicine Sweden (MIMS), Department of Molecular Biology, Umeå University, Umeå, Sweden
| | - Nicola Segata
- Department CIBIO, University of Trento, Trento, Italy
| | - Lothar Elling
- Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | - Till Strowig
- Department of Microbial Immune Regulation, Helmholtz Centre for Infection Research, Braunschweig, Germany.,Hannover Medical School, Hannover, Germany
| | - Jason M Ridlon
- Microbiome Metabolic Engineering Theme, Carl R. Woese Institute for Genomic Biology, Urbana, IL, USA.,Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Tobias A M Gulder
- Chair of Technical Biochemistry, Technical University of Dresden, Dresden, Germany
| | - Jörg Overmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, Germany
| | - Thomas Clavel
- Functional Microbiome Research Group, RWTH University Hospital, Aachen, Germany.
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36
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Proença M, Braun F, Lemay M, Solà J, Adler A, Riedel T, Messerli FH, Thiran JP, Rimoldi SF, Rexhaj E. Non-invasive pulmonary artery pressure estimation by electrical impedance tomography in a controlled hypoxemia study in healthy subjects. Sci Rep 2020; 10:21462. [PMID: 33293566 PMCID: PMC7722929 DOI: 10.1038/s41598-020-78535-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 11/25/2020] [Indexed: 11/09/2022] Open
Abstract
Pulmonary hypertension is a hemodynamic disorder defined by an abnormal elevation of pulmonary artery pressure (PAP). Current options for measuring PAP are limited in clinical practice. The aim of this study was to evaluate if electrical impedance tomography (EIT), a radiation-free and non-invasive monitoring technique, can be used for the continuous, unsupervised and safe monitoring of PAP. In 30 healthy volunteers we induced gradual increases in systolic PAP (SPAP) by exposure to normobaric hypoxemia. At various stages of the protocol, the SPAP of the subjects was estimated by transthoracic echocardiography. In parallel, in the pulmonary vasculature, pulse wave velocity was estimated by EIT and calibrated to pressure units. Within-cohort agreement between both methods on SPAP estimation was assessed through Bland-Altman analysis and at subject level, with Pearson's correlation coefficient. There was good agreement between the two methods (inter-method difference not significant (P > 0.05), bias ± standard deviation of - 0.1 ± 4.5 mmHg) independently of the degree of PAP, from baseline oxygen saturation levels to profound hypoxemia. At subject level, the median per-subject agreement was 0.7 ± 3.8 mmHg and Pearson's correlation coefficient 0.87 (P < 0.05). Our results demonstrate the feasibility of accurately assessing changes in SPAP by EIT in healthy volunteers. If confirmed in a patient population, the non-invasive and unsupervised day-to-day monitoring of SPAP could facilitate the clinical management of patients with pulmonary hypertension.
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Affiliation(s)
- Martin Proença
- Systems Division, Swiss Center for Electronics and Microtechnology (CSEM), Neuchâtel, Switzerland. .,Signal Processing Laboratory (LTS5), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Fabian Braun
- Systems Division, Swiss Center for Electronics and Microtechnology (CSEM), Neuchâtel, Switzerland.,Signal Processing Laboratory (LTS5), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Mathieu Lemay
- Systems Division, Swiss Center for Electronics and Microtechnology (CSEM), Neuchâtel, Switzerland
| | - Josep Solà
- Systems Division, Swiss Center for Electronics and Microtechnology (CSEM), Neuchâtel, Switzerland
| | - Andy Adler
- Systems and Computer Engineering, Carleton University, Ottawa, Canada
| | - Thomas Riedel
- Department of Paediatrics, Cantonal Hospital Graubuenden, Chur, Switzerland.,Department of Paediatrics, Inselspital Bern, University Children's Hospital, Bern, Switzerland
| | - Franz H Messerli
- Department of Cardiology and Clinical Research, Inselspital Bern, University Hospital, Bern, Switzerland
| | - Jean-Philippe Thiran
- Signal Processing Laboratory (LTS5), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.,Department of Radiology, University Hospital Center (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Stefano F Rimoldi
- Department of Cardiology and Clinical Research, Inselspital Bern, University Hospital, Bern, Switzerland
| | - Emrush Rexhaj
- Department of Cardiology and Clinical Research, Inselspital Bern, University Hospital, Bern, Switzerland
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37
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Hengartner T, Adams M, Pfister RE, Snyers D, McDougall J, Waldvogel S, Held-Egli K, Spring L, Rogdo B, Riedel T, Arlettaz Mieth R. Associations between Red Blood Cell and Platelet Transfusions and Retinopathy of Prematurity. Neonatology 2020; 117:1-7. [PMID: 33291117 PMCID: PMC7845415 DOI: 10.1159/000512020] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/14/2020] [Indexed: 12/21/2022]
Abstract
AIM The aim of this study is to examine possible associations between the transfusion of RBC or platelets (PLTs) and the development of retinopathy of prematurity (ROP) in infants. METHODS This retrospective, national, case-control study included all live births in Switzerland between 2013 and 2018. We investigated preterm infants at a gestational age of <28 weeks, who developed higher stage ROP (≥stage 2, n = 178). Each case infant was matched to another of the same sex who did not develop ROP (n = 178, control group). RESULTS When compared with the control group, we observed higher numbers of RBC transfusions per infant and higher percentages of infants receiving PLT transfusions in the case group. An adjusted logistic regression analysis revealed that both RBC (odds ratio [OR] 1.081, 95% confidence interval [CI] 1.020-1.146) and PLT transfusions (OR = 2.502, 95% CI 1.566-3.998) numbers were associated with ROP development. CONCLUSIONS Multiple RBC and PLT transfusions are associated with higher stage ROP development. Prospective studies are required to determine their potential as risk factors.
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Affiliation(s)
- Tobias Hengartner
- Newborn Research, Department of Neonatology, University Hospital and University of Zurich, Zurich, Switzerland,
| | - Mark Adams
- Newborn Research, Department of Neonatology, University Hospital and University of Zurich, Zurich, Switzerland
| | - Riccardo E Pfister
- Department of Child and Adolescent, University Hospital Geneva, Geneva, Switzerland
| | - Diane Snyers
- Department of Neonatology, University Hospital Lausanne, Lausanne, Switzerland
| | - Jane McDougall
- Department of Neonatology, University Hospital Berne, Berne, Switzerland
| | - Salome Waldvogel
- Department of Neonatology, University of Basel Children's Hospital, Basel, Switzerland
| | - Katrin Held-Egli
- Department of Neonatology, Children's Clinic, Cantonal Hospital Aarau, Aarau, Switzerland
| | - Lea Spring
- Department of Neonatology, Children's Hospital of Lucerne, Lucerne, Switzerland
| | - Bjarte Rogdo
- Neonatal and Paediatric Intensive Care Unit, Children's Hospital of Eastern Switzerland, St. Gallen, Switzerland
| | - Thomas Riedel
- Paediatric and Neonatal Intensive Care Unit, Department of Paediatrics, Cantonal Hospital Graubuenden, Chur, Switzerland
| | - Romaine Arlettaz Mieth
- Newborn Research, Department of Neonatology, University Hospital and University of Zurich, Zurich, Switzerland
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38
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Vieira S, Pascual J, Boedeker C, Geppert A, Riedel T, Rohde M, Overmann J. Terricaulis silvestris gen. nov., sp. nov., a novel prosthecate, budding member of the family Caulobacteraceae isolated from forest soil. Int J Syst Evol Microbiol 2020; 70:4966-4977. [DOI: 10.1099/ijsem.0.004367] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The family
Caulobacteraceae
comprises prosthecate bacteria with a dimorphic cell cycle and also non-prosthecate bacteria. Cells of all described species divide by binary fission. Strain 0127_4T was isolated from forest soil in Baden Württemberg (Germany) and determined to be the first representative of the family
Caulobacteraceae
which divided by budding. Cells of strain 0127_4T were Gram-negative, rod-shaped, prosthecate, motile by means of a polar flagellum, non-spore-forming and non-capsulated. The strain formed small white colonies and grew aerobically and chemo-organotrophically utilizing organic acids, amino acids and proteinaceous substrates. 16S rRNA gene sequence analysis indicated that this bacterium was related to
Aquidulcibacter paucihalophilus
TH1-2T and
Asprobacter aquaticus
DRW22-8T with 91.3 and 89.7% sequence similarity, respectively. Four unidentified glycolipids were detected as the major polar lipids and, unlike all described members of the family
Caulobacteraceae
, phosphatidylglycerol was absent. The major fatty acids were summed feature 8 (C18 : 1ω7c/C18 : 1ω6c), summed feature 9 (iso-C17 : 1ω9c/C16 : 0 10-methyl), C16 : 0 and summed feature 3 (C16 : 1
ω6c/C16 : 1
ω7c). The major respiratory quinone was Q-10. The G+C content of the genomic DNA was 63.5 %. Based on the present taxonomic characterization, strain 0127_4T represents a novel species of a new genus, Terricaulis silvestris gen. nov., sp. nov. The type strain of Terricaulis silvestris is 0127_4T (=DSM 104635T=CECT 9243T).
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Affiliation(s)
- Selma Vieira
- Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Javier Pascual
- Present address: Darwin Bioprospecting, Parc Científic de la Universitat de València c/Catedrático Agustín Escardino 9, 46980 Paterna (Valencia), Spain
- Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Christian Boedeker
- Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Alicia Geppert
- Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Manfred Rohde
- Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Jörg Overmann
- Braunschweig University of Technology, Spielmanstraße 7, 38106 Braunschweig, Germany
- Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
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39
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Hach PF, Marchant HK, Krupke A, Riedel T, Meier DV, Lavik G, Holtappels M, Dittmar T, Kuypers MMM. Rapid microbial diversification of dissolved organic matter in oceanic surface waters leads to carbon sequestration. Sci Rep 2020; 10:13025. [PMID: 32747679 PMCID: PMC7400608 DOI: 10.1038/s41598-020-69930-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 07/14/2020] [Indexed: 11/09/2022] Open
Abstract
The pool of dissolved organic matter (DOM) in the deep ocean represents one of the largest carbon sinks on the planet. In recent years, studies have shown that most of this pool is recalcitrant, because individual compounds are present at low concentrations and because certain compounds seem resistant to microbial degradation. The formation of the diverse and recalcitrant deep ocean DOM pool has been attributed to repeated and successive processing of DOM by microorganisms over time scales of weeks to years. Little is known however, about the transformation and cycling that labile DOM undergoes in the first hours upon its release from phytoplankton. Here we provide direct experimental evidence showing that within hours of labile DOM release, its breakdown and recombination with ambient DOM leads to the formation of a diverse array of new molecules in oligotrophic North Atlantic surface waters. Furthermore, our results reveal a preferential breakdown of N and P containing molecules versus those containing only carbon. Hence, we show the preferential breakdown and molecular diversification are the crucial first steps in the eventual formation of carbon rich DOM that is resistant to microbial remineralization.
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Affiliation(s)
- Philipp F Hach
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Hannah K Marchant
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Andreas Krupke
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Thomas Riedel
- IWW Water Centre, Moritzstr. 26, 45476, Mülheim an der Ruhr, Germany
| | - Dimitri V Meier
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
- Division of Microbial Ecology, Centre for Microbiology and Environmental Systems Science, University of Vienna, Althanstrasse 14 UZA I, 1090, Vienna, Austria
| | - Gaute Lavik
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Moritz Holtappels
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
- Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Am Handelshafen 12, 27570, Bremerhaven, Germany
| | - Thorsten Dittmar
- Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), at the Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, 26129, Oldenburg, Germany
- Helmholtz Institute for Functional Marine Biodiversity (HIFMB), University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, 26129, Oldenburg, Germany
| | - Marcel M M Kuypers
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany.
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40
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Frentrup M, Zhou Z, Steglich M, Meier-Kolthoff JP, Göker M, Riedel T, Bunk B, Spröer C, Overmann J, Blaschitz M, Indra A, von Müller L, Kohl TA, Niemann S, Seyboldt C, Klawonn F, Kumar N, Lawley TD, García-Fernández S, Cantón R, del Campo R, Zimmermann O, Groß U, Achtman M, Nübel U. A publicly accessible database for Clostridioides difficile genome sequences supports tracing of transmission chains and epidemics. Microb Genom 2020; 6:mgen000410. [PMID: 32726198 PMCID: PMC7641423 DOI: 10.1099/mgen.0.000410] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 06/30/2020] [Indexed: 01/02/2023] Open
Abstract
Clostridioides difficile is the primary infectious cause of antibiotic-associated diarrhea. Local transmissions and international outbreaks of this pathogen have been previously elucidated by bacterial whole-genome sequencing, but comparative genomic analyses at the global scale were hampered by the lack of specific bioinformatic tools. Here we introduce a publicly accessible database within EnteroBase (http://enterobase.warwick.ac.uk) that automatically retrieves and assembles C. difficile short-reads from the public domain, and calls alleles for core-genome multilocus sequence typing (cgMLST). We demonstrate that comparable levels of resolution and precision are attained by EnteroBase cgMLST and single-nucleotide polymorphism analysis. EnteroBase currently contains 18 254 quality-controlled C. difficile genomes, which have been assigned to hierarchical sets of single-linkage clusters by cgMLST distances. This hierarchical clustering is used to identify and name populations of C. difficile at all epidemiological levels, from recent transmission chains through to epidemic and endemic strains. Moreover, it puts newly collected isolates into phylogenetic and epidemiological context by identifying related strains among all previously published genome data. For example, HC2 clusters (i.e. chains of genomes with pairwise distances of up to two cgMLST alleles) were statistically associated with specific hospitals (P<10-4) or single wards (P=0.01) within hospitals, indicating they represented local transmission clusters. We also detected several HC2 clusters spanning more than one hospital that by retrospective epidemiological analysis were confirmed to be associated with inter-hospital patient transfers. In contrast, clustering at level HC150 correlated with k-mer-based classification and was largely compatible with PCR ribotyping, thus enabling comparisons to earlier surveillance data. EnteroBase enables contextual interpretation of a growing collection of assembled, quality-controlled C. difficile genome sequences and their associated metadata. Hierarchical clustering rapidly identifies database entries that are related at multiple levels of genetic distance, facilitating communication among researchers, clinicians and public-health officials who are combatting disease caused by C. difficile.
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Affiliation(s)
| | - Zhemin Zhou
- Warwick Medical School, University of Warwick, UK
| | - Matthias Steglich
- Leibniz Institute DSMZ, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Germany
| | | | | | - Thomas Riedel
- Leibniz Institute DSMZ, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Germany
| | - Boyke Bunk
- Leibniz Institute DSMZ, Braunschweig, Germany
| | | | - Jörg Overmann
- Leibniz Institute DSMZ, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Germany
- Braunschweig Integrated Center of Systems Biology (BRICS), Technical University, Braunschweig, Germany
| | - Marion Blaschitz
- AGES-Austrian Agency for Health and Food Safety, Vienna, Austria
| | - Alexander Indra
- AGES-Austrian Agency for Health and Food Safety, Vienna, Austria
| | | | - Thomas A. Kohl
- Research Center Borstel, Germany
- German Center for Infection Research (DZIF), Partner site Hamburg-Lübeck-Borstel, Germany
| | - Stefan Niemann
- Research Center Borstel, Germany
- German Center for Infection Research (DZIF), Partner site Hamburg-Lübeck-Borstel, Germany
| | | | - Frank Klawonn
- Biostatistics, Helmholtz Centre for Infection Research, Braunschweig, Germany
- Institute for Information Engineering, Ostfalia University, Wolfenbüttel, Germany
| | | | | | - Sergio García-Fernández
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
- Red Española de Investigación en Patología Infecciosa (REIPI), Madrid, Spain
| | - Rafael Cantón
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
- Red Española de Investigación en Patología Infecciosa (REIPI), Madrid, Spain
| | - Rosa del Campo
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
- Red Española de Investigación en Patología Infecciosa (REIPI), Madrid, Spain
| | | | - Uwe Groß
- University Medical Center Göttingen, Germany
| | - Mark Achtman
- Warwick Medical School, University of Warwick, UK
| | - Ulrich Nübel
- Leibniz Institute DSMZ, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner site Hannover-Braunschweig, Germany
- Braunschweig Integrated Center of Systems Biology (BRICS), Technical University, Braunschweig, Germany
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41
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Alberdi I, Bender S, Riedel T, Avitable V, Boriaud O, Bosela M, Camia A, Cañellas I, Castro Rego F, Fischer C, Freudenschuß A, Fridman J, Gasparini P, Gschwantner T, Guerrero S, Kjartansson B, Kucera M, Lanz A, Marin G, Mubareka S, Notarangelo M, Nunes L, Pesty B, Pikula T, Redmond J, Rizzo M, Seben V, Snorrason A, Tomter S, Hernández L. Assessing forest availability for wood supply in Europe. For Policy Econ 2020; 111:102032. [PMID: 32140044 PMCID: PMC7043395 DOI: 10.1016/j.forpol.2019.102032] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 08/01/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
The quantification of forests available for wood supply (FAWS) is essential for decision-making with regard to the maintenance and enhancement of forest resources and their contribution to the global carbon cycle. The provision of harmonized forest statistics is necessary for the development of forest associated policies and to support decision-making. Based on the National Forest Inventory (NFI) data from 13 European countries, we quantify and compare the areas and aboveground dry biomass (AGB) of FAWS and forest not available for wood supply (FNAWS) according to national and reference definitions by determining the restrictions and associated thresholds considered at country level to classify forests as FAWS or FNAWS. FAWS represent between 75 and 95 % of forest area and AGB for most of the countries in this study. Economic restrictions are the main factor limiting the availability of forests for wood supply, accounting for 67 % of the total FNAWS area and 56 % of the total FNAWS AGB, followed by environmental restrictions. Profitability, slope and accessibility as economic restrictions, and protected areas as environmental restrictions are the factors most frequently considered to distinguish between FAWS and FNAWS. With respect to the area of FNAWS associated with each type of restriction, an overlap among the restrictions of 13.7 % was identified. For most countries, the differences in the FNAWS areas and AGB estimates between national and reference definitions ranged from 0 to 5 %. These results highlight the applicability and reliability of a FAWS reference definition for most of the European countries studied, thereby facilitating a consistent approach to assess forests available for supply for the purpose of international reporting.
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Affiliation(s)
- I. Alberdi
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Ctra. La Coruña, 7.5 Km, 28040, Madrid, Spain
| | - S. Bender
- Thünen Institute of Forest Ecosystems, Alfred-Möller-Straße 1, House 41/42, 16225, Eberswalde, Germany
| | - T. Riedel
- Thünen Institute of Forest Ecosystems, Alfred-Möller-Straße 1, House 41/42, 16225, Eberswalde, Germany
| | - V. Avitable
- European Commission, Joint Research Centre, Via E. Fermi 2749, 21027, Ispra, Italy
| | - O. Boriaud
- National Institute for Research and Development in Forestry, 128 Eroilor Boulevard, 077190, Voluntari, Ilfov, Romania
| | - M. Bosela
- National Forest Centre, T.G.Masaryka 22, Zvolen, 960 92, Slovak Republic
- Technical University in Zvolen, T.G. Masaryka 24, 960 53, Zvolen, Slovak Republic
| | - A. Camia
- European Commission, Joint Research Centre, Via E. Fermi 2749, 21027, Ispra, Italy
| | - I. Cañellas
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Ctra. La Coruña, 7.5 Km, 28040, Madrid, Spain
| | - F. Castro Rego
- Centre for Applied Ecology “Professor Baeta Neves” (CEABN), InBIO, School of Agriculture, University of Lisbon, Tapada da Ajud, 1349-017, Lisboa, Portugal
| | - C. Fischer
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, 8903, Birmensdorf, Switzerland
| | - A. Freudenschuß
- Federal Research and Training Centre for Forests, Natural Hazards and Landscape (BFW), Seckendorff-Gudent-Weg 8, 1131, Vienna, Austria
| | - J. Fridman
- Swedish University of Agricultural Sciences, Faculty of Forest Sciences, SE-901 83, Umea, Sweden
| | - P. Gasparini
- CREA – Research Centre for Forestry and Wood, P.zza Nicolini 6, 38123, Trento, Italy
| | - T. Gschwantner
- Federal Research and Training Centre for Forests, Natural Hazards and Landscape (BFW), Seckendorff-Gudent-Weg 8, 1131, Vienna, Austria
| | - S. Guerrero
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Ctra. La Coruña, 7.5 Km, 28040, Madrid, Spain
| | | | - M. Kucera
- FMI Brandys nad Labem, Nabrezni 1326, 250 01, Brandys nad Labem, Czech Republic
| | - A. Lanz
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, 8903, Birmensdorf, Switzerland
| | - G. Marin
- National Institute for Research and Development in Forestry, 128 Eroilor Boulevard, 077190, Voluntari, Ilfov, Romania
| | - S. Mubareka
- European Commission, Joint Research Centre, Via E. Fermi 2749, 21027, Ispra, Italy
| | - M. Notarangelo
- CREA – Research Centre for Forestry and Wood, P.zza Nicolini 6, 38123, Trento, Italy
| | - L. Nunes
- Centre for Applied Ecology “Professor Baeta Neves” (CEABN), InBIO, School of Agriculture, University of Lisbon, Tapada da Ajud, 1349-017, Lisboa, Portugal
- CITAB, Centre of the Research and Technology of Agro-Environmental and Biological Science, University of Trás-os-Montes and Alto Douro, Quinta de Prados, 5000-801, Vila Real, Portugal
| | - B. Pesty
- Institut national de l'information géographique et forestière, Château des barres, Nogent-sur-Vernisson, France
| | - T. Pikula
- FMI Brandys nad Labem, Nabrezni 1326, 250 01, Brandys nad Labem, Czech Republic
| | - J. Redmond
- Department of Agriculture, Food and the Marine, Johnstown Castle Estate, Wexford, Ireland
| | - M. Rizzo
- CREA – Research Centre for Forestry and Wood, P.zza Nicolini 6, 38123, Trento, Italy
| | - V. Seben
- National Forest Centre, T.G.Masaryka 22, Zvolen, 960 92, Slovak Republic
| | - A. Snorrason
- Icelandic Forest Research, Mogilsa, 162 Reykjavik, Iceland
| | - S. Tomter
- Norwegian Institute of Bioeconomy Research, Høgskoleveien 8, 1433, Ås, Norway
| | - L. Hernández
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Ctra. La Coruña, 7.5 Km, 28040, Madrid, Spain
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Emele MF, Joppe FM, Riedel T, Overmann J, Rupnik M, Cooper P, Kusumawati RL, Berger FK, Laukien F, Zimmermann O, Bohne W, Groß U, Bader O, Zautner AE. Proteotyping of Clostridioides difficile as Alternate Typing Method to Ribotyping Is Able to Distinguish the Ribotypes RT027 and RT176 From Other Ribotypes. Front Microbiol 2019; 10:2087. [PMID: 31552001 PMCID: PMC6747054 DOI: 10.3389/fmicb.2019.02087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 08/23/2019] [Indexed: 12/17/2022] Open
Abstract
Clostridioides difficile, a Gram-positive spore-forming bacterium, is the leading cause of nosocomial diarrhea worldwide and therefore a substantial burden to the healthcare system. During the past decade, hypervirulent PCR-ribotypes (RT) e.g., RT027 or RT176 emerged rapidly all over the world, associated with both, increased severity and mortality rates. It is thus of great importance to identify epidemic strains such as RT027 and RT176 as fast as possible. While commonly used diagnostic methods, e.g., multilocus sequence typing (MLST) or PCR-ribotyping, are time-consuming, proteotyping offers a fast, inexpensive, and reliable alternative solution. In this study, we established a MALDI-TOF-based typing scheme for C. difficile. A total of 109 ribotyped strains representative for five MLST clades were analyzed by MALDI-TOF. MLST, based on whole genome sequences, and PCR-ribotyping were used as reference methods. Isoforms of MS-detectable biomarkers, typically ribosomal proteins, were related with the deduced amino acid sequences and added to the C. difficile proteotyping scheme. In total, we were able to associate nine biomarkers with their encoding genes and include them in our proteotyping scheme. The discriminatory capacity of the C. difficile proteotyping scheme was mainly based on isoforms of L28-M (2 main isoforms), L35-M (4 main isoforms), and S20-M (2 main isoforms) giving rise to at least 16 proteotyping-derived types. In our test population, five of these 16 proteotyping-derived types were detected. These five proteotyping-derived types did not correspond exactly to the included five MLST-based C. difficile clades, nevertheless the subtyping depth of both methods was equivalent. Most importantly, proteotyping-derived clade B contained only isolates of the hypervirulent RT027 and RT176. Proteotyping is a stable and easy-to-perform intraspecies typing method and a promising alternative to currently used molecular techniques. It is possible to distinguish the group of RT027 and RT176 isolates from non-RT027/non-RT176 isolates using proteotyping, providing a valuable diagnostic tool.
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Affiliation(s)
- Matthias F Emele
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Felix M Joppe
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Thomas Riedel
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany.,Deutsches Zentrum für Infektionsforschung (DZIF), Standort Hannover-Braunschweig, Braunschweig, Germany
| | - Jörg Overmann
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Braunschweig, Germany.,Deutsches Zentrum für Infektionsforschung (DZIF), Standort Hannover-Braunschweig, Braunschweig, Germany
| | - Maja Rupnik
- National Laboratory for Health, Environment and Food (NLZOH), Maribor, Slovenia.,Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | | | - R Lia Kusumawati
- Department of Microbiology, Faculty of Medicine, Universitas Sumatera Utara, Medan, Indonesia
| | - Fabian K Berger
- National Reference Center for Clostridioides (Clostridium) difficile, Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Friederike Laukien
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Ortrud Zimmermann
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Wolfgang Bohne
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Uwe Groß
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Oliver Bader
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Göttingen, Germany
| | - Andreas E Zautner
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Göttingen, Germany
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Grychtol B, Schramel JP, Braun F, Riedel T, Auer U, Mosing M, Braun C, Waldmann AD, Böhm SH, Adler A. Thoracic EIT in 3D: experiences and recommendations. Physiol Meas 2019; 40:074006. [PMID: 31189141 DOI: 10.1088/1361-6579/ab291d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE In EIT applications to the thorax, a single electrode plane has typically been used to reconstruct a transverse 2D 'slice'. However, such images can be misleading as EIT is sensitive to contrasts above and below the electrode plane, and ventilation and aeration inhomogeneities can be distributed in complex ways. Using two (or more) electrode planes, 3D EIT images may be reconstructed, but 3D reconstructions are currently little used in thoracic EIT. In this paper, we investigate an incremental pathway towards 3D EIT reconstructions, using two electrode planes to calculate improved transverse slices as an intermediate step. We recommend a specific placement of electrode planes, and further demonstrate the feasibility of multi-slice reconstruction in two species. APPROACH Simulations of the forward and reconstructed sensitivities were analysed for two electrode planes using a 'square' pattern of electrode placement as a function of two variables: the stimulation and measurement 'skip', and the electrode plane separation. Next, single- versus two-plane measurements were compared in a horse and in human volunteers. We further show the feasibility of 3D reconstructions by reconstructing multiple transverse and, unusually, frontal slices during ventilation. MAIN RESULTS Using two electrode planes leads to a reduced position error and improvement in off-plane contrast rejection. 2D reconstructions from two-plane measurements showed better separation of lungs, as compared to the single plane measurements which tend to push contrasts in the center of the image. 3D reconstructions of the same data show anatomically plausible images, inside as well as outside the volume between the two electrode planes. SIGNIFICANCE Based on the results, we recommend EIT electrode planes separated by less than half of the minimum thoracic dimension with a 'skip 4' pattern and 'square' placement to produce images with good slice selectivity.
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Affiliation(s)
- Bartłomiej Grychtol
- Fraunhofer Project Group for Automation in Medicine and Biotechnology, Mannheim, Germany. Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
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Theiler L, Schneeberg F, Riedel T, Kaiser H, Riva T, Greif R. Apnoeic oxygenation with nasal cannula oxygen at different flow rates in anaesthetised patients: a study protocol for a non-inferiority randomised controlled trial. BMJ Open 2019; 9:e025442. [PMID: 31300494 PMCID: PMC6629420 DOI: 10.1136/bmjopen-2018-025442] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
INTRODUCTION Apnoeic oxygenation using nasal high-flow oxygen delivery systems with heated and humidified oxygen has recently gained popularity in the anaesthesia community. It has been shown to allow a prolonged apnoea time of up to 65 min as CO2 increase was far slower compared with previously reported data from CO2 increase during apnoea. A ventilatory exchange due to the high nasal oxygen flow was proposed explaining that phenomenon. However, recent studies in children did not show any difference in CO2 clearance comparing high-flow with low-flow oxygen. To investigate this ventilatory exchange in adults, we plan this study comparing different oxygen flow rates and the increase of CO2 during apnoea. We hypothesise that CO2 clearance is non-inferior when applying low oxygen flow rates. METHODS AND ANALYSIS In this single-centre, single-blinded, randomised controlled trial, we randomly assign 100 patients planned for elective surgery to either control (oxygen 70 L/min, airway opened by laryngoscopy) or one of three intervention groups: oxygen 70, or 10, or 2 L/min, all with jaw thrust to secure airway patency. After anaesthesia induction and neuromuscular blockage, either one of the interventions or the control will be applied according to randomisation. Throughout the apnoea period, we will measure the increase of transcutaneous pCO2 (tcpCO2) until any one of the following criteria is met: time=15 min, SpO2 <92%, tcpCO2 >10.67 kPa, art. pH <7.1, K+ >6.0 mmol/L. Primary outcome is the mean tcpCO2 increase in kPa/min. ETHICS AND DISSEMINATION After Cantonal Ethic Committee of Bern approval (ID 2018-00293, 22.03.2018), all study participants will provide written informed consent. Patients vulnerable towards hypoxia or hypercarbia are excluded. Study results will be published in a peer-reviewed journal and presented at national and international conferences. TRIAL REGISTRATION NUMBER This study was registered on www.clinicaltrials.gov (NCT03478774,Pre-results) and the Swiss Trial Registry KOFAM (SNCTP000002861).
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Affiliation(s)
- Lorenz Theiler
- Universitaetsklinik fur Anaesthesiologie und Schmerztherapie, Inselspital Bern, Bern, Switzerland
| | - Fabian Schneeberg
- Universitaetsklinik fur Anaesthesiologie und Schmerztherapie, Inselspital Bern, Bern, Switzerland
| | | | - Heiko Kaiser
- Universitaetsklinik fur Anaesthesiologie und Schmerztherapie, Inselspital Bern, Bern, Switzerland
| | - Thomas Riva
- Universitaetsklinik fur Anaesthesiologie und Schmerztherapie, Inselspital Bern, Bern, Switzerland
| | - Robert Greif
- Universitaetsklinik fur Anaesthesiologie und Schmerztherapie, Inselspital Bern, Bern, Switzerland
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Numberger D, Riedel T, McEwen G, Nübel U, Frentrup M, Schober I, Bunk B, Spröer C, Overmann J, Grossart HP, Greenwood AD. Genomic analysis of three Clostridioides difficile isolates from urban water sources. Anaerobe 2019; 56:22-26. [DOI: 10.1016/j.anaerobe.2019.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 11/05/2018] [Accepted: 01/04/2019] [Indexed: 02/08/2023]
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Emele MF, Možina SS, Lugert R, Bohne W, Masanta WO, Riedel T, Groß U, Bader O, Zautner AE. Proteotyping as alternate typing method to differentiate Campylobacter coli clades. Sci Rep 2019; 9:4244. [PMID: 30862911 PMCID: PMC6414644 DOI: 10.1038/s41598-019-40842-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 02/25/2019] [Indexed: 11/26/2022] Open
Abstract
Besides Campylobacter jejuni, Campylobacter coli is the most common bacterial cause of gastroenteritis worldwide. C. coli is subdivided into three clades, which are associated with sample source. Clade 1 isolates are associated with acute diarrhea in humans whereas clade 2 and 3 isolates are more commonly obtained from environmental waters. The phylogenetic classification of an isolate is commonly done using laborious multilocus sequence typing (MLST). The aim of this study was to establish a proteotyping scheme using MALDI-TOF MS to offer an alternative to sequence-based methods. A total of 97 clade-representative C. coli isolates were analyzed by MALDI-TOF-based intact cell mass spectrometry (ICMS) and evaluated to establish a C. coli proteotyping scheme. MLST was used as reference method. Different isoforms of the detectable biomarkers, resulting in biomarker mass shifts, were associated with their amino acid sequences and included into the C. coli proteotyping scheme. In total, we identified 16 biomarkers to differentiate C. coli into the three clades and three additional sub-clades of clade 1. In this study, proteotyping has been successfully adapted to C. coli. The established C. coli clades and sub-clades can be discriminated using this method. Especially the clinically relevant clade 1 isolates can be differentiated clearly.
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Affiliation(s)
- Matthias Frederik Emele
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany
| | - Sonja Smole Možina
- Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
| | - Raimond Lugert
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany
| | - Wolfgang Bohne
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany
| | - Wycliffe Omurwa Masanta
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany.,Department of Medical Microbiology, Maseno University Medical School, Private Bag, Maseno, Kenya
| | - Thomas Riedel
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen, Braunschweig, Germany.,Deutsches Zentrum für Infektionsforschung (DZIF), Standort Hannover-Braunschweig, Braunschweig, Germany
| | - Uwe Groß
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany
| | - Oliver Bader
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany
| | - Andreas Erich Zautner
- Institut für Medizinische Mikrobiologie, Universitätsmedizin Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany.
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Mehner-Breitfeld D, Rathmann C, Riedel T, Just I, Gerhard R, Overmann J, Brüser T. Evidence for an Adaptation of a Phage-Derived Holin/Endolysin System to Toxin Transport in Clostridioides difficile. Front Microbiol 2018; 9:2446. [PMID: 30405545 PMCID: PMC6200909 DOI: 10.3389/fmicb.2018.02446] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/25/2018] [Indexed: 12/16/2022] Open
Abstract
The pathogenicity locus (PaLoc) of Clostridioides difficile usually comprises five genes (tcdR, tcdB, tcdE, tcdA, tcdC). While the proteins TcdA and TcdB represent the main toxins of this pathogen, TcdR and TcdC are involved in the regulation of their production. TcdE is a holin family protein, members of which are usually involved in the transport of cell wall-degrading enzymes (endolysins) for phage-induced lysis. In the past, TcdE has been shown to contribute to the release of TcdA and TcdB, but it is unclear whether it mediates a specific transport or rather a lysis of cells. TcdE of C. difficile strains analyzed so far can be produced in three isoforms that are initiated from distinct N-terminal ATG codons. When produced in Escherichia coli, we found that the longest TcdE isoform had a moderate effect on cell growth, whereas the shortest isoform strongly induced lysis. The effect of the longest isoform was inhibitory for cell lysis, implying a regulatory function of the N-terminal 24 residues. We analyzed the PaLoc sequence of 44 C. difficile isolates and found that four of these apparently encode only the short TcdE isoforms, and the most closely related holins from C. difficile phages only possess one of these initiation codons, indicating that an N-terminal extension of TcdE evolved in C. difficile. All PaLoc sequences comprised also a conserved gene encoding a short fragment of an endolysin remnant of a phage holin/endolysin pair. We could produce this peptide, which we named TcdL, and demonstrated by bacterial two-hybrid analysis a self-interaction and an interaction with TcdB that might serve to mediate TcdE-dependent transport.
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Affiliation(s)
| | - Claudia Rathmann
- Institute of Microbiology, Leibniz Universität Hannover, Hanover, Germany
| | - Thomas Riedel
- Department of Microbial Ecology and Diversity Research, Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research, Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Ingo Just
- Institute of Toxicology, Hannover Medical School, Hanover, Germany
| | - Ralf Gerhard
- Institute of Toxicology, Hannover Medical School, Hanover, Germany
| | - Jörg Overmann
- Department of Microbial Ecology and Diversity Research, Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research, Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Thomas Brüser
- Institute of Microbiology, Leibniz Universität Hannover, Hanover, Germany
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Murillo T, Ramírez-Vargas G, Riedel T, Overmann J, Andersen JM, Guzmán-Verri C, Chaves-Olarte E, Rodríguez C. Two Groups of Cocirculating, Epidemic Clostridiodes difficile Strains Microdiversify through Different Mechanisms. Genome Biol Evol 2018; 10:982-998. [PMID: 29617810 PMCID: PMC5888409 DOI: 10.1093/gbe/evy059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2018] [Indexed: 02/04/2023] Open
Abstract
Clostridiodes difficile strains from the NAPCR1/ST54 and NAP1/ST01 types have caused outbreaks despite of their notable differences in genome diversity. By comparing whole genome sequences of 32 NAPCR1/ST54 isolates and 17 NAP1/ST01 recovered from patients infected with C. difficile we assessed whether mutation, homologous recombination (r) or nonhomologous recombination (NHR) through lateral gene transfer (LGT) have differentially shaped the microdiversification of these strains. The average number of single nucleotide polymorphisms (SNPs) in coding sequences (NAPCR1/ST54 = 24; NAP1/ST01 = 19) and SNP densities (NAPCR1/ST54 = 0.54/kb; NAP1/ST01 = 0.46/kb) in the NAPCR1/ST54 and NAP1/ST01 isolates was comparable. However, the NAP1/ST01 isolates showed 3× higher average dN/dS rates (8.35) that the NAPCR1/ST54 isolates (2.62). Regarding r, whereas 31 of the NAPCR1/ST54 isolates showed 1 recombination block (3,301–8,226 bp), the NAP1/ST01 isolates showed no bases in recombination. As to NHR, the pangenome of the NAPCR1/ST54 isolates was larger (4,802 gene clusters, 26% noncore genes) and more heterogeneous (644 ± 33 gene content changes) than that of the NAP1/ST01 isolates (3,829 gene clusters, ca. 6% noncore genes, 129 ± 37 gene content changes). Nearly 55% of the gene content changes seen among the NAPCR1/ST54 isolates (355 ± 31) were traced back to MGEs with putative genes for antimicrobial resistance and virulence factors that were only detected in single isolates or isolate clusters. Congruently, the LGT/SNP rate calculated for the NAPCR1/ST54 isolates (26.8 ± 2.8) was 4× higher than the one obtained for the NAP1/ST1 isolates (6.8 ± 2.0). We conclude that NHR-LGT has had a greater role in the microdiversification of the NAPCR1/ST54 strains, opposite to the NAP1/ST01 strains, where mutation is known to play a more prominent role.
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Affiliation(s)
- Tatiana Murillo
- Facultad de Microbiología and Centro de Investigación en Enfermedades Tropicales (CIET), Universidad de Costa Rica, San José, Costa Rica
| | - Gabriel Ramírez-Vargas
- Facultad de Microbiología and Centro de Investigación en Enfermedades Tropicales (CIET), Universidad de Costa Rica, San José, Costa Rica
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Jörg Overmann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Joakim M Andersen
- Department of Food, Processing and Nutritional Sciences, North Carolina State University
| | - Caterina Guzmán-Verri
- Programa de Investigación en Enfermedades Tropicales (PIET), Escuela de Medicina Veterinaria, Universidad Nacional, Heredia, Costa Rica
| | - Esteban Chaves-Olarte
- Facultad de Microbiología and Centro de Investigación en Enfermedades Tropicales (CIET), Universidad de Costa Rica, San José, Costa Rica
| | - César Rodríguez
- Facultad de Microbiología and Centro de Investigación en Enfermedades Tropicales (CIET), Universidad de Costa Rica, San José, Costa Rica
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Giannoni E, Agyeman PKA, Stocker M, Posfay-Barbe KM, Heininger U, Spycher BD, Bernhard-Stirnemann S, Niederer-Loher A, Kahlert CR, Donas A, Leone A, Hasters P, Relly C, Riedel T, Kuehni C, Aebi C, Berger C, Schlapbach LJ. Neonatal Sepsis of Early Onset, and Hospital-Acquired and Community-Acquired Late Onset: A Prospective Population-Based Cohort Study. J Pediatr 2018; 201:106-114.e4. [PMID: 30054165 DOI: 10.1016/j.jpeds.2018.05.048] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 05/09/2018] [Accepted: 05/30/2018] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To assess the epidemiology of blood culture-proven early- (EOS) and late-onset neonatal sepsis (LOS). STUDY DESIGN All newborn infants admitted to tertiary care neonatal intensive care units in Switzerland and presenting with blood culture-proven sepsis between September 2011 and December 2015 were included in the study. We defined EOS as infection occurring <3 days after birth, and LOS as infection ≥3 days after birth. Infants with LOS were classified as having community-acquired LOS if onset of infection was ≤48 hours after admission, and hospital-acquired LOS, if onset was >48 hours after admission. Incidence was estimated based on the number of livebirths in Switzerland and adjusted for the proportion of admissions at centers participating in the study. RESULTS We identified 444 episodes of blood culture-proven sepsis in 429 infants; 20% of cases were EOS, 62% hospital-acquired LOS, and 18% community-acquired LOS. The estimated national incidence of EOS, hospital-acquired LOS, and community-acquired LOS was 0.28 (95% CI 0.23-0.35), 0.86 (0.76-0.97), and 0.28 (0.23-0.34) per 1000 livebirths. Compared with EOS, hospital-acquired LOS occurred in infants of lower gestational age and was more frequently associated with comorbidities. Community-acquired LOS was more common in term infants and in male infants. Mortality was 18%, 12%, and 0% in EOS, hospital-acquired LOS, and community-acquired LOS, and was higher in preterm infants, in infants with septic shock, and in those requiring mechanical ventilation. CONCLUSIONS We report a high burden of sepsis in neonates with considerable mortality and morbidity. EOS, hospital-acquired LOS, and community-acquired LOS affect specific patient subgroups and have distinct clinical presentation, pathogens and outcomes.
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Affiliation(s)
- Eric Giannoni
- Clinic of Neonatology, Department Woman-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland; Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, Lausanne, Switzerland.
| | - Philipp K A Agyeman
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Martin Stocker
- Department of Pediatrics, Children's Hospital Lucerne, Lucerne, Switzerland
| | - Klara M Posfay-Barbe
- Pediatric Infectious Diseases Unit, Children's Hospital of Geneva, University Hospitals of Geneva, Geneva, Switzerland
| | - Ulrich Heininger
- Infectious Diseases and Vaccinology, University of Basel Children's Hospital, Basel, Switzerland
| | - Ben D Spycher
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | | | | | | | - Alex Donas
- Department of Pediatrics, Children's Hospital Lucerne, Lucerne, Switzerland
| | - Antonio Leone
- Department of Neonatology, University Hospital Zurich, Zurich, Switzerland
| | - Paul Hasters
- Department of Neonatology, University Hospital Zurich, Zurich, Switzerland
| | - Christa Relly
- Division of Infectious Diseases, and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Thomas Riedel
- Department of Pediatrics, Cantonal Hospital Graubuenden, Chur, Switzerland
| | - Claudia Kuehni
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Christoph Aebi
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Christoph Berger
- Division of Infectious Diseases, and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Luregn J Schlapbach
- Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; Faculty of Medicine, The University of Queensland, Brisbane, Australia; Paediatric Critical Care Research Group, Mater Research Institute, The University of Queensland, Brisbane, Australia; Paediatric Intensive Care Unit, Lady Cilento Children's Hospital, Children's Health Queensland, Brisbane, Australia
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Schwanbeck J, Riedel T, Laukien F, Schober I, Oehmig I, Zimmermann O, Overmann J, Groß U, Zautner AE, Bohne W. Characterization of a clinical Clostridioides difficile isolate with markedly reduced fidaxomicin susceptibility and a V1143D mutation in rpoB. J Antimicrob Chemother 2018; 74:6-10. [DOI: 10.1093/jac/dky375] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 08/23/2018] [Indexed: 01/20/2023] Open
Abstract
Abstract
Objectives
The identification and characterization of clinical Clostridioides difficile isolates with reduced fidaxomicin susceptibility.
Methods
Agar dilution assays were used to determine fidaxomicin MICs. Genome sequence data were obtained by single-molecule real-time (SMRT) sequencing in addition to amplicon sequencing of rpoB and rpoC alleles. Allelic exchange was used to introduce the identified mutation into C. difficile 630Δerm. Replication rates, toxin A/B production and spore formation were determined from the strain with reduced fidaxomicin susceptibility.
Results
Out of 50 clinical C. difficile isolates, isolate Goe-91 revealed markedly reduced fidaxomicin susceptibility (MIC >64 mg/L). A V1143D mutation was identified in rpoB of Goe-91. When introduced into C. difficile 630Δerm, this mutation decreased fidaxomicin susceptibility (MIC >64 mg/L), but was also associated with a reduced replication rate, low toxin A/B production and markedly reduced spore formation. In contrast, Goe-91, although also reduced in toxin production, showed normal growth rates and only moderately reduced spore formation capacities. This indicates that the rpoBV1143D allele-associated fitness defect is less pronounced in the clinical isolate.
Conclusions
To the best of our knowledge, this is the first description of a pathogenic clinical C. difficile isolate with markedly reduced fidaxomicin susceptibility. The lower-than-expected fitness burden of the resistance-mediating rpoBV1143D allele might be an indication for compensatory mechanisms that take place during in vivo selection of mutants.
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Affiliation(s)
- Julian Schwanbeck
- Institute for Medical Microbiology, University Medical Center Göttingen, Göttingen, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ–German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Hannover–Braunschweig, Braunschweig, Germany
| | - Friederike Laukien
- Institute for Medical Microbiology, University Medical Center Göttingen, Göttingen, Germany
| | - Isabel Schober
- Leibniz Institute DSMZ–German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Ines Oehmig
- Institute for Medical Microbiology, University Medical Center Göttingen, Göttingen, Germany
| | - Ortrud Zimmermann
- Institute for Medical Microbiology, University Medical Center Göttingen, Göttingen, Germany
| | - Jörg Overmann
- Leibniz Institute DSMZ–German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Hannover–Braunschweig, Braunschweig, Germany
| | - Uwe Groß
- Institute for Medical Microbiology, University Medical Center Göttingen, Göttingen, Germany
| | - Andreas E Zautner
- Institute for Medical Microbiology, University Medical Center Göttingen, Göttingen, Germany
| | - Wolfgang Bohne
- Institute for Medical Microbiology, University Medical Center Göttingen, Göttingen, Germany
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