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Zhu J, Haanpera M, Mentula S, Vapalahti O, Soini H, Sironen T, Kant R, Zakham F. Transmission of drug-resistant Mycobacterium tuberculosis isolates between Finnish- and foreign-born cases, 2014-2021: A molecular epidemiological study. Tuberculosis (Edinb) 2024; 146:102492. [PMID: 38364331 DOI: 10.1016/j.tube.2024.102492] [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: 09/01/2023] [Revised: 02/03/2024] [Accepted: 02/11/2024] [Indexed: 02/18/2024]
Abstract
BACKGROUND Data on the molecular epidemiology and transmission of drug-resistant Mycobacterium tuberculosis (MTB) in low-incidence settings with immigration from high-incidence settings is limited. METHOD We included 115 drug-resistant (DR) MTB isolates with whole-genome sequencing data isolated in Finland between 2014 and 2021. Potential transmission clusters were identified using a threshold of 12 single-nucleotide polymorphisms (SNPs). Highly related clusters were identified using a threshold of 5 SNPs. RESULT Of the 115 DR MTB isolates, 31 (27.0%) isolates were from Finnish-born cases and 84 (73.0%) were from foreign-born cases. The proportion of multidrug-resistant (MDR) MTB isolates (30/84, 35.7%) from foreign-born cases was higher than that of MDR MTB isolates from Finnish-born cases (8/31, 25.8%). Lineage 2 (40/115, 34.8%) and lineage 4 (40/115, 34.8%) were the most prevalent lineages. A total of 25 (21.7%) isolates were classified into eight potential transmission clusters (≤12 SNPs). Furthermore, five highly related clusters (≤5 SNPs) were identified, including three DR MTB isolates from Finnish-born cases and 14 DR isolates from foreign-born cases. CONCLUSION The risk of DR MTB transmission between Finnish- and foreign-born persons is not negligible. Further research on clustering analysis in drug-susceptible MTB is worth to inform tuberculosis management and control in low-incidence settings with increasing immigration.
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Affiliation(s)
- Jiahui Zhu
- Department of Virology, University of Helsinki, Helsinki, Finland.
| | - Marjo Haanpera
- Department of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Silja Mentula
- Department of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Olli Vapalahti
- Department of Virology, University of Helsinki, Helsinki, Finland; Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
| | - Hanna Soini
- Department of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Tarja Sironen
- Department of Virology, University of Helsinki, Helsinki, Finland; Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
| | - Ravi Kant
- Department of Virology, University of Helsinki, Helsinki, Finland; Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland; Department of Tropical Parasitology, Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Gdynia, Poland
| | - Fathiah Zakham
- Department of Virology, University of Helsinki, Helsinki, Finland; Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
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Mentula S, Kääriäinen S, Jaakola S, Niittynen M, Airaksinen P, Koivula I, Lehtola M, Mauranen E, Mononen I, Savolainen R, Haatainen S, Lyytikäinen O. Tap water as the source of a Legionnaires' disease outbreak spread to several residential buildings and one hospital, Finland, 2020 to 2021. Euro Surveill 2023; 28:2200673. [PMID: 36927717 PMCID: PMC10021472 DOI: 10.2807/1560-7917.es.2023.28.11.2200673] [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: 03/18/2023] Open
Abstract
In Finland, all microbiology laboratories notify Legionella findings and physicians notify Legionnaires' disease (LD) cases to the National Infectious Disease Register. All cases are interviewed, and water samples obtained from potential places of exposure. Legionella isolates from humans and water are compared by whole genome sequencing (WGS). In March 2021, Legionella pneumophila serogroup 1 (Lp 1) pneumonia cases increased in one Finnish city (120,000 inhabitants) where single LD cases are detected annually. We identified 12 LD cases, nine living in different residential buildings and three nosocomial, linked by identical human and/or water isolates. Three of these cases were from January 2020, October 2020 and February 2021 and identified retrospectively. Eleven were diagnosed by urinary antigen test, 10 by PCR and five by culture; age ranged between 52 and 85 years, and 10 had underlying diseases. Nine of 12 homes of LD cases and 15 of 26 water samples from the hospital were positive for Lp 1, with concentrations up to 640,000 cfu/L. Water samples from regional storage tanks were negative. Positivity in homes and the hospital suggested inadequate maintenance measures. Enhanced surveillance combined with WGS was crucial in detecting this unusual LD outbreak related to domestic and hospital water systems.
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Affiliation(s)
- Silja Mentula
- Finnish National Institute for Health and Welfare, Helsinki, Finland
| | - Sohvi Kääriäinen
- Finnish National Institute for Health and Welfare, Helsinki, Finland.,ECDC Fellowship Programme, Field Epidemiology path (EPIET), European Centre for Disease Prevention and Control (ECDC), Solna, Sweden
| | - Sari Jaakola
- Finnish National Institute for Health and Welfare, Helsinki, Finland
| | - Marjo Niittynen
- Finnish National Institute for Health and Welfare, Helsinki, Finland
| | - Piia Airaksinen
- Finnish National Institute for Health and Welfare, Helsinki, Finland
| | | | | | | | | | | | | | - Outi Lyytikäinen
- Finnish National Institute for Health and Welfare, Helsinki, Finland
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3
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Mentula S, Paakkanen J, Hyyryläinen HL. External quality assessment by European mycobacterial laboratories: results of AFB microscopy and identification rounds. Diagn Microbiol Infect Dis 2022; 104:115757. [PMID: 35870367 DOI: 10.1016/j.diagmicrobio.2022.115757] [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: 04/04/2022] [Revised: 06/13/2022] [Accepted: 06/23/2022] [Indexed: 11/03/2022]
Abstract
We analyzed mycobacterial stain, culture and identification EQA data from altogether 134 laboratories in 15 mainly European countries over a 4-year period. The aim was to get an overview of the performance and methods and identify diagnostic challenges. The overall success rates for staining and identification were 94% and 91%. The false negative rate for staining was significantly higher for the medium positive than the strong positive slides (11% vs 4%). The false positive rate on negative slides was 10%, indicating contamination issues. The overall success of M. tuberculosis detection was high with error rates ranging from 0.7% to 1.2%. Pre- or postanalytical errors accounted for most of the unsuccessful responses. The detection of nontuberculous mycobacteria (NTM) was less consistent; accurate species identification depended on the assays used. Only 19% of participants performed species level identification for NTMs, 47% detected the presence NTMs while 21% focused on ruling out TB.
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Affiliation(s)
- Silja Mentula
- Finnish Institute for Health and Welfare, Dept. Health Security, Mycobacterial Reference Laboratory, Helsinki, Finland.
| | | | - Hanne-Leena Hyyryläinen
- Finnish Institute for Health and Welfare, Dept. Health Security, Mycobacterial Reference Laboratory, Helsinki, Finland
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Mentula S, Karkamo V, Skrzypczak T, Seppänen J, Hyyryläinen HL, Haanperä M, Soini H. Emerging source of infection - Mycobacterium tuberculosis in rescue dogs: a case report. Access Microbiol 2020; 2:acmi000168. [PMID: 33294771 PMCID: PMC7717481 DOI: 10.1099/acmi.0.000168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 04/27/2020] [Accepted: 08/12/2020] [Indexed: 12/02/2022] Open
Abstract
Rescue dog activity is a heavily increasing form of dog charity. Imported homeless dogs represent a reservoir of zoonotic diseases putting owners, veterinarians and pathologists repeatedly at risk. The clinical signs of tuberculosis in a dog are non-specific and diagnosis is often delayed or dismissed. We present a case of 9 months of possible exposure at home and definite exposure at laparotomy and autopsy to intestinal tuberculosis in a family dog imported from Romania to Finland. Persistent gastrointestinal symptoms started 2 years after the import. Abdominal pain, diarrhoea and vomiting proceeded and led to spontaneous death. Mycobacterium tuberculosis was identified in the liver, lymph nodes and intestine at autopsy. Exposed persons were notified and follow-up was provided, and no further infections were identified within 12 months of follow-up. The heavily increasing import of companion animals presents unexpected public health risks, such as prolonged exposure to tuberculosis, of which the general public is not aware. The dramatic consequences and high costs of tuberculosis could be reduced through accessible information of the risks of imported animals to both the general public and veterinarians, in addition to availability of rapid diagnostics and proper personal protection.
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Affiliation(s)
- Silja Mentula
- Department of Health Security, Finnish National Institute for Health and Welfare, Helsinki, Finland
| | - Veera Karkamo
- Veterinary Bacteriology and Pathology Unit, Finnish Food Authority, Helsinki, Finland
| | - Teresa Skrzypczak
- Veterinary Bacteriology and Pathology Unit, Finnish Food Authority, Helsinki, Finland
| | - Jaana Seppänen
- Veterinary Bacteriology and Pathology Unit, Finnish Food Authority, Helsinki, Finland
| | - Hanne-Leena Hyyryläinen
- Department of Health Security, Finnish National Institute for Health and Welfare, Helsinki, Finland
| | - Marjo Haanperä
- Department of Health Security, Finnish National Institute for Health and Welfare, Helsinki, Finland
| | - Hanna Soini
- Department of Health Security, Finnish National Institute for Health and Welfare, Helsinki, Finland
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Kotila SM, Mentula S, Ollgren J, Virolainen-Julkunen A, Lyytikäinen O. Community- and Healthcare-Associated Clostridium difficile Infections, Finland, 2008-2013. Emerg Infect Dis 2018; 22:1747-1753. [PMID: 27648884 PMCID: PMC5038409 DOI: 10.3201/eid2210.151492] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Prudent use of antimicrobial drugs in outpatient settings is needed for reducing the burden of infection. We evaluated incidence, case-fatality rate, and trends of community-associated (CA) and healthcare-associated (HA) Clostridium difficile infections (CDIs) in Finland during 2008–2013. CDIs were identified in the National Infectious Disease Register, deaths in the National Population Information System, hospitalizations to classify infections as CA or HA in the National Hospital Discharge Register, and genotypes in a reference laboratory. A total of 32,991 CDIs were identified: 10,643 (32.3%) were CA (32.9 cases/100,000 population) and 22,348 (67.7%) HA (69.1/100,000). Overall annual incidence decreased from 118.7/100,000 in 2008 to 92.1/100,000 in 2013, which was caused by reduction in HA-CDI rates (average annual decrease 8.1%; p<0.001). The 30-day case-fatality rate was lower for CA-CDIs than for HA-CDIs (3.2% vs. 13.3%; p<0.001). PCR ribotypes 027 and 001 were more common in HA-CDIs than in CA-CDIs. Although the HA-CDI incidence rate decreased, which was probably caused by increased awareness and improved infection control, the CA-CDI rate increased.
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Sung V, D'Amico F, Cabana MD, Chau K, Koren G, Savino F, Szajewska H, Deshpande G, Dupont C, Indrio F, Mentula S, Partty A, Tancredi D. Lactobacillus reuteri to Treat Infant Colic: A Meta-analysis. Pediatrics 2018; 141:peds.2017-1811. [PMID: 29279326 DOI: 10.1542/peds.2017-1811] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/20/2017] [Indexed: 02/04/2023] Open
Abstract
CONTEXT Lactobacillus reuteri DSM17938 has shown promise in managing colic, but conflicting study results have prevented a consensus on whether it is truly effective. OBJECTIVE Through an individual participant data meta-analysis, we sought to definitively determine if L reuteri DSM17938 effectively reduces crying and/or fussing time in infants with colic and whether effects vary by feeding type. DATA SOURCES We searched online databases (PubMed, Medline, Embase, the Cumulative Index to Nursing and Allied Health Literature, the Database of Abstracts of Reviews of Effects, and Cochrane), e-abstracts, and clinical trial registries. STUDY SELECTION These were double-blind randomized controlled trials (published by June 2017) of L reuteri DSM17398 versus a placebo, delivered orally to infants with colic, with outcomes of infant crying and/or fussing duration and treatment success at 21 days. DATA EXTRACTION We collected individual participant raw data from included studies modeled simultaneously in multilevel generalized linear mixed-effects regression models. RESULTS Four double-blind trials involving 345 infants with colic (174 probiotic and 171 placebo) were included. The probiotic group averaged less crying and/or fussing time than the placebo group at all time points (day 21 adjusted mean difference in change from baseline [minutes] -25.4 [95% confidence interval (CI): -47.3 to -3.5]). The probiotic group was almost twice as likely as the placebo group to experience treatment success at all time points (day 21 adjusted incidence ratio 1.7 [95% CI: 1.4 to 2.2]). Intervention effects were dramatic in breastfed infants (number needed to treat for day 21 success 2.6 [95% CI: 2.0 to 3.6]) but were insignificant in formula-fed infants. LIMITATIONS There were insufficient data to make conclusions for formula-fed infants with colic. CONCLUSIONS L reuteri DSM17938 is effective and can be recommended for breastfed infants with colic. Its role in formula-fed infants with colic needs further research.
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Affiliation(s)
- Valerie Sung
- Murdoch Children's Research Institute, The Royal Children's Hospital, and the University of Melbourne, Melbourne, Victoria, Australia;
| | - Frank D'Amico
- Department of Mathematics, Duquesne University, Pittsburgh, Pennsylvania.,University of Pittsburgh Medical Center St. Margaret's Hospital, Pittsburgh, Pennsylvania
| | - Michael D Cabana
- Department of Pediatrics, Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, San Francisco, California
| | - Kim Chau
- University of Toronto and The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Gideon Koren
- University of Toronto and The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Francesco Savino
- Ospendale Infantile Regina Margherita, Citta della Salute e della Scienza di Torino, Torino, Italy
| | - Hania Szajewska
- Department of Paediatrics, The Medical University of Warsaw, Warsaw, Poland
| | - Girish Deshpande
- Department of Neonatology, Nepean Hospital and Sydney Medical School Nepean, University of Sydney, Sydney, New South Wales, Australia
| | - Christophe Dupont
- Department of Pediatric Gastroenterology, Paris Descartes University and Necker-Enfants Malades Hospital, Paris, France
| | - Flavia Indrio
- Department of Pediatrics, University of Bari, Bari, Italy
| | - Silja Mentula
- Bacteriology Unit, National Institute for Health and Welfare, Helsinki, Finland
| | - Anna Partty
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland; and
| | - Daniel Tancredi
- Department of Pediatrics, University of California Davis Health System, Sacramento, California
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7
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Mentula S, Kotila SM, Lyytikäinen O, Ibrahem S, Ollgren J, Virolainen A. Clostridium difficile infections in Finland, 2008–2015: trends, diagnostics and ribotypes. Eur J Clin Microbiol Infect Dis 2017; 36:1939-1945. [DOI: 10.1007/s10096-017-3017-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 05/15/2017] [Indexed: 02/06/2023]
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8
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Krutova M, Nyc O, Matejkova J, Kuijper EJ, Jalava J, Mentula S. The recognition and characterisation of Finnish Clostridium difficile isolates resembling PCR-ribotype 027. J Microbiol Immunol Infect 2017; 51:344-351. [PMID: 28583353 DOI: 10.1016/j.jmii.2017.02.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/03/2017] [Accepted: 02/06/2017] [Indexed: 02/08/2023]
Abstract
PURPOSE To characterise and compare twenty-eight Finnish Clostridium difficile RT027-like isolates, selected based on the presence of 18 bp deletion in the tcdC gene and toxin gene profile (A, B, binary), with eleven RT027 isolates from different Finnish geographical areas and time periods. METHODS Twenty-eight C. difficile RT027-like isolates and 11 RT027 comparative strains were characterised by capillary-electrophoresis (CE) ribotyping, multi-locus variable tandem-repeats analysis (MLVA), multi-locus sequence typing (MLST), and sequencing of tcdC and gyrA gene fragments. Susceptibility to moxifloxacin was determined by E-test. RESULTS Of 28 RT027-like isolates, seven RTs (016, 034, 075, 080, 153, 176 and 328), three WEBRIBO types (411, 475, AI-78) and three new profiles (F1-F3) were identified. MLVA revealed six clonal complexes (RTs 016, 027, 176 and F3). MLST showed eleven sequence types (1, 41, 47, 67, 95, 191,192, 223, 229, 264 and new ST). Twenty-two isolates (RTs 016, 080, 176, 328, F1, F2, F3 and WRTAI-78) carried Δ117 in the tcdC gene. Isolates of RTs 016, 027 and 176 were moxifloxacin resistant and harboured Thr82Ile in the GyrA. CONCLUSION Our results show a high diversity within 28 Finnish RT027-like C. difficile isolates, with twelve CE-ribotyping profiles and eleven STs. MLVA revealed the regional spread of RTs 016, 027, 176 and F3. The presence of Δ117 in the tcdC gene in eight non-027 RTs highlights the importance of careful interpretation of the results from molecular systems targeting this site in the genome of C. difficile and the need of strain typing for epidemiological purposes.
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Affiliation(s)
- Marcela Krutova
- Department of Medical Microbiology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic; DNA Laboratory, Department of Paediatric Neurology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic.
| | - Otakar Nyc
- Department of Medical Microbiology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic
| | - Jana Matejkova
- Department of Medical Microbiology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Czech Republic
| | - Ed J Kuijper
- Leiden University Medical Centre, Leiden, The Netherlands
| | - Jari Jalava
- Bacterial Infections Unit, Department of Infectious Diseases, National Institute for Health and Welfare, Helsinki, Finland
| | - Silja Mentula
- Bacterial Infections Unit, Department of Infectious Diseases, National Institute for Health and Welfare, Helsinki, Finland
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9
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van Dorp SM, Notermans DW, Alblas J, Gastmeier P, Mentula S, Nagy E, Spigaglia P, Ivanova K, Fitzpatrick F, Barbut F, Morris T, Wilcox MH, Kinross P, Suetens C, Kuijper EJ. Survey of diagnostic and typing capacity for Clostridium difficile infection in Europe, 2011 and 2014. Euro Surveill 2016; 21:30292. [DOI: 10.2807/1560-7917.es.2016.21.29.30292] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 02/03/2016] [Indexed: 01/05/2023] Open
Abstract
Suboptimal laboratory diagnostics for Clostridium difficile infection (CDI) impedes its surveillance and control across Europe. We evaluated changes in local laboratory CDI diagnostics and changes in national diagnostic and typing capacity for CDI during the European C. difficile Infection Surveillance Network (ECDIS-Net) project, through cross-sectional surveys in 33 European countries in 2011 and 2014. In 2011, 126 (61%) of a convenience sample of 206 laboratories in 31 countries completed a survey on local diagnostics. In 2014, 84 (67%) of these 126 laboratories in 26 countries completed a follow-up survey. Among laboratories that participated in both surveys, use of CDI diagnostics deemed ‘optimal’ or ‘acceptable’ increased from 19% to 46% and from 10% to 15%, respectively (p < 0.001). The survey of national capacity was completed by national coordinators of 31 and 32 countries in 2011 and 2014, respectively. Capacity for any C. difficile typing method increased from 22/31 countries in 2011 to 26/32 countries in 2014; for PCR ribotyping from 20/31 countries to 23/32 countries, and specifically for capillary PCR ribotyping from 7/31 countries to 16/32 countries. While our study indicates improved diagnostic capability and national capacity for capillary PCR ribotyping across European laboratories between 2011 and 2014, increased use of ‘optimal’ diagnostics should be promoted.
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Affiliation(s)
- Sofie M van Dorp
- Department of Medical Microbiology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Daan W Notermans
- National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Jeroen Alblas
- National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Petra Gastmeier
- Institut für Hygiene und Umweltmedizin, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Silja Mentula
- National Institute for Health and Welfare (THL), Helsinki, Finland
| | - Elisabeth Nagy
- Institute of Clinical Microbiology, University of Szeged, Szeged, Hungary
| | | | - Katiusha Ivanova
- National Centre of Infectious and Parasitic Diseases, Sofia, Bulgaria
| | - Fidelma Fitzpatrick
- Health Protection Surveillance Centre and Beaumont Hospital, Dublin, Ireland
| | - Frédéric Barbut
- National Reference Laboratory for C. difficile, Paris, France
| | - Trefor Morris
- Public Health Wales, UK Anaerobe Reference Laboratory, Cardiff, United Kingdom
| | - Mark H Wilcox
- Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
| | - Pete Kinross
- European Centre for Disease Prevention and Control, Stockholm, Sweden
| | - Carl Suetens
- European Centre for Disease Prevention and Control, Stockholm, Sweden
| | - Ed J Kuijper
- Department of Medical Microbiology, Leiden University Medical Centre, Leiden, the Netherlands
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van Dorp SM, Kinross P, Gastmeier P, Behnke M, Kola A, Delmée M, Pavelkovich A, Mentula S, Barbut F, Hajdu A, Ingebretsen A, Pituch H, Macovei IS, Jovanović M, Wiuff C, Schmid D, Olsen KEP, Wilcox MH, Suetens C, Kuijper EJ. Standardised surveillance of Clostridium difficile infection in European acute care hospitals: a pilot study, 2013. Euro Surveill 2016; 21:30293. [DOI: 10.2807/1560-7917.es.2016.21.29.30293] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 03/18/2016] [Indexed: 11/20/2022] Open
Abstract
Clostridium difficile infection (CDI) remains poorly controlled in many European countries, of which several have not yet implemented national CDI surveillance. In 2013, experts from the European CDI Surveillance Network project and from the European Centre for Disease Prevention and Control developed a protocol with three options of CDI surveillance for acute care hospitals: a ‘minimal’ option (aggregated hospital data), a ‘light’ option (including patient data for CDI cases) and an ‘enhanced’ option (including microbiological data on the first 10 CDI episodes per hospital). A total of 37 hospitals in 14 European countries tested these options for a three-month period (between 13 May and 1 November 2013). All 37 hospitals successfully completed the minimal surveillance option (for 1,152 patients). Clinical data were submitted for 94% (1,078/1,152) of the patients in the light option; information on CDI origin and outcome was complete for 94% (1,016/1,078) and 98% (294/300) of the patients in the light and enhanced options, respectively. The workload of the options was 1.1, 2.0 and 3.0 person-days per 10,000 hospital discharges, respectively. Enhanced surveillance was tested and was successful in 32 of the hospitals, showing that C. difficile PCR ribotype 027 was predominant (30% (79/267)). This study showed that standardised multicountry surveillance, with the option of integrating clinical and molecular data, is a feasible strategy for monitoring CDI in Europe.
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Affiliation(s)
- Sofie M van Dorp
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, the Netherlands
| | - Pete Kinross
- Surveillance and Response Support Unit, European Centre for Disease Prevention and Control, Stockholm, Sweden
| | - Petra Gastmeier
- Institut für Hygiene und Umweltmedizin, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Michael Behnke
- Institut für Hygiene und Umweltmedizin, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Axel Kola
- Institut für Hygiene und Umweltmedizin, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Michel Delmée
- Microbiology Unit, Université Catholique de Louvain, Louvain-la-Neuve, Brussels, Belgium
| | | | - Silja Mentula
- Department of Infectious Disease Surveillance and Control, Bacteriology Unit, National Institute for Health and Welfare, Helsinki, Finland
| | - Frédéric Barbut
- Hôpital Saint-Antoine, Paris, France
- National Reference Laboratory for Clostridium difficile, Pierre et Marie Curie University, Paris, France
| | - Agnes Hajdu
- Department of Hospital Epidemiology and Hygiene, National Center for Epidemiology, Budapest, Hungary
| | - André Ingebretsen
- Departments of Infection Prevention and Microbiology, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Hanna Pituch
- Department of Medical Microbiology, Medical University of Warsaw, Warsaw, Poland
| | - Ioana S Macovei
- National Institute for Microbiology and Immunology, Laboratory of Anaerobic Bacteria, Cantacuzino Institute, Bucharest, Romania
| | - Milica Jovanović
- Department of Microbiology, Clinical Center of Serbia, Belgrade, Serbia
| | | | - Daniela Schmid
- Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
| | - Katharina EP Olsen
- Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark
| | - Mark H Wilcox
- University of Leeds, Leeds, United Kingdom
- Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
| | - Carl Suetens
- Surveillance and Response Support Unit, European Centre for Disease Prevention and Control, Stockholm, Sweden
| | - Ed J Kuijper
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, the Netherlands
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11
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Kotila SM, Mentula S, Ollgren J, Virolainen-Julkunen A, Lyytikäinen O. Community- vs. healthcare-associated Clostridium difficile infections, Finland, 2008-2013: incidence, case fatality and genotypes. Antimicrob Resist Infect Control 2015. [PMCID: PMC4474924 DOI: 10.1186/2047-2994-4-s1-p23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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12
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Arifulla DK, Mentula S, Kotila SM, Ollgren J, Möttönen T, Lyytikäinen O. Surveillance of Clostridium difficile infections in Finnish acute care hospitals, 2008-2014: trends, diagnostics and control measures. Antimicrob Resist Infect Control 2015. [PMCID: PMC4474676 DOI: 10.1186/2047-2994-4-s1-p22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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13
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Mentula S, Laakso S, Lyytikäinen O, Kirveskari J. Differentiating virulent 027 and non-027 Clostridium difficile strains by molecular methods. Expert Rev Mol Diagn 2015; 15:1225-9. [PMID: 26289601 DOI: 10.1586/14737159.2015.1069710] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Hypervirulent Clostridium difficile clade has been shown to include several lineages of ribotype 027 and also other ribotypes. We present data on additional non-027 strains, identified as presumptive 027 by two commercial molecular C. difficile assays. METHODS The tested clinical isolates were selected from the national reference laboratory collection on the basis of toxin gene profile similarities with ribotype 027 and tested with XpertC. difficile/Epi and Amplidiag C. difficile+027 assay. RESULT Xpert misclassified five ribotypes (016, 019, 080, 176 and variant of type 046) as presumptive 027 and Amplidiag two ribotypes (016, 176). The misclassified strains were rare, covering 1.6% of reference laboratory strain collection. CONCLUSION Our findings confirm the concept that there are closely related outliers to hypervirulent 027 clones that can be misclassified as 027, and that these comprise numerous ribotypes, including previously reported four ribotypes (198, 176, 244, 019), and additional three (016, v046, 080) identified in the present study.
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Affiliation(s)
- Silja Mentula
- a 1 National Institute for Health and Welfare - Infectious Diseases, P.O. Box 30, Helsinki 00271, Finland
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Kanerva M, Ollgren J, Voipio T, Mentula S, Lyytikäinen O. Regional differences in Clostridium difficile infections in relation to fluoroquinolone and proton pump inhibitor use, Finland, 2008-2011. Infect Dis (Lond) 2015; 47:530-5. [PMID: 25832317 DOI: 10.3109/23744235.2015.1026933] [Citation(s) in RCA: 6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Several antimicrobial agents and proton pump inhibitors (PPIs) have been identified as risk factors for Clostridium difficile infections (CDIs). Nationwide laboratory-based surveillance of CDIs in Finland since 2008 has shown variation in regional CDI rates. We evaluated whether regional differences in CDI rates were associated with antibacterial and PPI use. METHODS Data on mean annual incidence rates of CDIs during 2008-2011 in 21 healthcare districts (HDs) were obtained from the National Infectious Disease Register, consumption (median annual use) of antimicrobials and PPIs from the Finnish Medical Agency, availability of molecular diagnostics by a laboratory survey and data on ribotypes from the national reference laboratory. The association over the 4 years was measured by incidence rate ratio (IRR) and we performed both bivariate and multivariate analyses. RESULTS During 2008-2011, PPI use increased 27% but fluoroquinolone use was stable. The level of fluoroquinolone use was strongly associated with the mean annual CDI incidence rate in different HDs over the 4-year period, but PPI use had less effect. The molecular diagnostics methodology and PCR ribotype 027 were not independently associated with CDI rate. The final multivariable model only included fluoroquinolone and PPI use; IRR for fluoroquinolones was 2.20 (95% confidence interval (CI), 1.32-3.67; p = 0.003). CONCLUSIONS Fluoroquinolone use may play a role in regional differences in CDI rates. Although the use has not recently increased, regionally targeted antimicrobial stewardship campaigns promoting appropriate use of fluoroquinolones should still be encouraged since they may decrease the incidence of CDIs.
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Affiliation(s)
- Mari Kanerva
- From the 1Department of Infectious Disease Surveillance and Control, National Institute for Health and Welfare (THL) , Helsinki , Finland
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Sung V, Cabana MD, D'Amico F, Deshpande G, Dupont C, Indrio F, Mentula S, Partty A, Savino F, Szajewska H, Tancredi D. Lactobacillus reuteri DSM 17938 for managing infant colic: protocol for an individual participant data meta-analysis. BMJ Open 2014; 4:e006475. [PMID: 25475244 PMCID: PMC4256605 DOI: 10.1136/bmjopen-2014-006475] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION Infant colic, or excessive crying of unknown cause in infants less than 3 months old, is common and burdensome. Its aetiology is undetermined, and consensus on its management is still lacking. Recent studies suggest a possible link between infant colic and gut microbiota, indicating probiotics to be a promising treatment. However, only a few strains have been tested, and results from randomised controlled trials are conflicting. It is important to clarify whether probiotics are effective for treating infant colic in general, and to identify whether certain subgroups of infants with colic would benefit from particular strains of probiotics. METHODS AND ANALYSIS Through an individual participant data meta-analysis (IPDMA), we aim to identify whether the probiotic Lactobacillus reuteri DSM 17938 is effective in the management of infant colic, and to clarify whether its effects differ according to feeding method (breast vs formula vs combined), proton pump inhibitor exposure, and antibiotic exposure. The primary outcomes are infant crying duration and treatment success (at least 50% reduction in crying time from baseline) at 21 days postintervention. Individual participant data from all studies will be modelled simultaneously in multilevel generalised linear mixed-effects regression models to account for the nesting of participants within studies. Subgroup analyses of participant-level and intervention-level characteristics will be undertaken on the primary outcomes to assess if the intervention effect differs between certain groups of infants. ETHICS AND DISSEMINATION Approved by the Royal Children's Hospital Human Research Ethics Committee (HREC 34081). Results will be reported in a peer-reviewed journal in 2015. TRIAL REGISTRATION NUMBER PROSPERO CRD42014013210.
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Affiliation(s)
- Valerie Sung
- Murdoch Childrens Research Institute, Royal Children's Hospital, The University of Melbourne, Melbourne, Victoria, Australia
| | - Michael D Cabana
- Department of Pediatrics, Epidemiology and Biostatistics, University of California, San Francisco (UCSF) School of Medicine, San Francisco, California, USA
| | - Frank D'Amico
- Duquesne University/UPMC St. Margaret Hospital, Pittsburgh, Pennsylvania, USA
| | - Girish Deshpande
- Department of Children's health division and NICU, Nepean Hospital Sydney, Sydney, New South Wales, Australia
- Sydney Medical School Nepean, University of Sydney, Sydney, New South Wales, Australia
| | - Christophe Dupont
- Department of Pediatric Gastroenterology, Paris Descartes University, Necker Hospital, Paris, France
| | - Flavia Indrio
- Department of Pediatrics, University of Bari, Bari, Italy
| | - Silja Mentula
- Bacteriology Unit, National Institute for Health and Welfare, Helsinki, Finland
| | - Anna Partty
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland
| | - Francesco Savino
- Ospedale Infantile Regina Margherita, Città della Salute e della Scienza di Torino, Torino, Italy
| | - Hania Szajewska
- Department of Paediatrics, The Medical University of Warsaw, Warsaw, Poland
| | - Daniel Tancredi
- Department of Pediatrics, UC Davis Health System, Sacramento, California, USA
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Mentula S, Pentikäinen J, Perola O, Ruotsalainen E. Legionella longbeachae infection in a persistent hand-wound after a gardening accident. JMM Case Rep 2014; 1:e004374. [PMID: 28663819 PMCID: PMC5415940 DOI: 10.1099/jmmcr.0.004374] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Accepted: 10/22/2014] [Indexed: 12/31/2022] Open
Abstract
Introduction: Unlike other Legionella species, Legionella longbeachae has been associated with soil and potting composts instead of water systems, and it has caused pneumonia in gardeners. Case presentation: We report, to our knowledge, the first case of prolonged localized L. longbeachae infection in an accidental wound on the back of a hand caused by a broken flowerpot. Conclusion: Identification of L. longbeachae requires awareness and expertise, since commercial tests are most often specific for L. pneumophila.
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Affiliation(s)
- Silja Mentula
- Bacteriology Unit, National Institute for Health and Welfare, P.O. Box 30, FI-00271 Helsinki, Finland
| | - Jaana Pentikäinen
- Eastern Finland Laboratory Centre Joint Authority Enterprise (ISLAB), Puijonlaaksontie 2, 70211 Kuopio, Finland
| | - Outi Perola
- Eastern Finland Laboratory Centre Joint Authority Enterprise (ISLAB), Puijonlaaksontie 2, 70211 Kuopio, Finland
| | - Eija Ruotsalainen
- Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland
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Davies KA, Longshaw CM, Davis GL, Bouza E, Barbut F, Barna Z, Delmée M, Fitzpatrick F, Ivanova K, Kuijper E, Macovei IS, Mentula S, Mastrantonio P, von Müller L, Oleastro M, Petinaki E, Pituch H, Norén T, Nováková E, Nyč O, Rupnik M, Schmid D, Wilcox MH. Underdiagnosis of Clostridium difficile across Europe: the European, multicentre, prospective, biannual, point-prevalence study of Clostridium difficile infection in hospitalised patients with diarrhoea (EUCLID). Lancet Infect Dis 2014; 14:1208-19. [PMID: 25455988 DOI: 10.1016/s1473-3099(14)70991-0] [Citation(s) in RCA: 247] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Variations in testing for Clostridium difficile infection can hinder patients' care, increase the risk of transmission, and skew epidemiological data. We aimed to measure the underdiagnosis of C difficile infection across Europe. METHODS We did a questionnaire-based study at 482 participating hospitals across 20 European countries. Hospitals were questioned about their methods and testing policy for C difficile infection during the periods September, 2011, to August, 2012, and September, 2012, to August, 2013. On one day in winter, 2012-13 (December, 2012, or January, 2013), and summer, 2013 (July or August), every hospital sent all diarrhoeal samples submitted to their microbiology laboratory to a national coordinating laboratory for standardised testing of C difficile infection. Our primary outcome measures were the rates of testing for and cases of C difficile infection per 10 000 patient bed-days. Results of local and national C difficile infection testing were compared with each other. If the result was positive at the national laboratory but negative at the local hospital, the result was classified as undiagnosed C difficile infection. We compared differences in proportions with the Mann-Whitney test, or McNemar's test if data were matched. FINDINGS During the study period, participating hospitals reported a mean of 65·8 tests (country range 4·6-223·3) for C difficile infection per 10 000 patient-bed days and a mean of 7·0 cases (country range 0·7-28·7) of C difficile infection per 10 000 patient-bed days. Only two-fifths of hospitals reported using optimum methods for testing of C difficile infection (defined by European guidelines), although the number of participating hospitals using optimum methods increased during the study period, from 152 (32%) of 468 in 2011-12 to 205 (48%) of 428 in 2012-13. Across all 482 European hospitals on the two sampling days, 148 (23%) of 641 samples positive for C difficile infection (as determined by the national laboratory) were not diagnosed by participating hospitals because of an absence of clinical suspicion, equating to about 74 missed diagnoses per day. INTERPRETATION A wide variety of testing strategies for C difficile infection are used across Europe. Absence of clinical suspicion and suboptimum laboratory diagnostic methods mean that an estimated 40 000 inpatients with C difficile infection are potentially undiagnosed every year in 482 European hospitals. FUNDING Astellas Pharmaceuticals Europe.
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Affiliation(s)
- Kerrie A Davies
- EUCLID European Coordinators, University of Leeds, Leeds, UK
| | | | | | - Emilio Bouza
- Catedrático-Jefe de Servicio, Microbiologica Clinica E Infecciosas, Hospital General Universitario 'Gregorio Marañón', Madrid, Spain
| | - Frédéric Barbut
- National Reference Laboratory for Clostridium difficile, Université Pierre et Marie Curie, Paris, France
| | - Zsuzsanna Barna
- Department of Bacteriology, National Centre for Epidemiology, Budapest, Hungary
| | - Michel Delmée
- Univerisité Catholique de Louvain, Institut de Recherché Expérimentale et Clinique (IREC), Brussels, Belgium
| | - Fidelma Fitzpatrick
- Health Protection Surveillance Centre and Beaumont Hospital, Dublin, Ireland
| | - Kate Ivanova
- National Centre of Infectious and Parasitic Diseases, Sofia, Bulgaria
| | - Ed Kuijper
- Department of Medical Microbiology, Leiden University Medical Centre, Leiden, Netherlands
| | - Ioana S Macovei
- 'Cantacuzino' National Institute of Research and Development for Microbiology and Immunology, Bucharest, Romania
| | - Silja Mentula
- Bacteriology Unit, National Institute for Health and Welfare (THL), Helsinki, Finland
| | - Paola Mastrantonio
- Istituto Superiore di Sanità, Department of Infectious Diseases, Rome, Italy
| | - Lutz von Müller
- Institute of Medical Microbiology and Hygiene, University of Saarland Medical Centre, Homburg/Saar, Germany
| | - Mónica Oleastro
- Department of Infectious Diseases, National Institute for Health 'Dr Ricardo Jorge', Lisbon, Portugal
| | - Efthymia Petinaki
- University Hospital, Medical School, University of Thessalia, Larissa, Greece
| | - Hanna Pituch
- Department of Medical Microbiology, Medical University of Warsaw, Warsaw, Poland
| | | | - Elena Nováková
- Jessenius Faculty of Medicine in Martin, Comenius University, Bratislava, Martin, Slovakia
| | - Otakar Nyč
- Department of Medical Microbiology, University Hospital in Motol, Prague, Czech Republic
| | - Maja Rupnik
- National Laboratory for Health, Environment and Food (NLZOH), and University of Maribor, Faculty of Medicine, Maribor, Slovenia
| | - Daniela Schmid
- Austrian Agency for Health and Food Safety, Institute for Medical Microbiology and Hygiene, Vienna, Austria
| | - Mark H Wilcox
- EUCLID European Coordinators, University of Leeds, Leeds, UK.
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Hirvonen JJ, Mentula S, Kaukoranta SS. Evaluation of a new automated homogeneous PCR assay, GenomEra C. difficile, for rapid detection of Toxigenic Clostridium difficile in fecal specimens. J Clin Microbiol 2013; 51:2908-12. [PMID: 23804386 PMCID: PMC3754623 DOI: 10.1128/jcm.01083-13] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 06/19/2013] [Indexed: 12/18/2022] Open
Abstract
We evaluated a new automated homogeneous PCR assay to detect toxigenic Clostridium difficile, the GenomEra C. difficile assay (Abacus Diagnostica, Finland), with 310 diarrheal stool specimens and with a collection of 33 known clostridial and nonclostridial isolates. Results were compared with toxigenic culture results, with discrepancies being resolved by the GeneXpert C. difficile PCR assay (Cepheid). Among the 80 toxigenic culture-positive or GeneXpert C. difficile assay-positive fecal specimens, 79 were also positive with the GenomEra C. difficile assay. Additionally, one specimen was positive with the GenomEra assay but negative with the confirmatory methods. Thus, the sensitivity and specificity were 98.8% and 99.6%, respectively. With the culture collection, no false-positive or -negative results were observed. The analytical sensitivity of the GenomEra C. difficile assay was approximately 5 CFU per PCR test. The short hands-on (<5 min for 1 to 4 samples) and total turnaround (<1 h) times, together with the high positive and negative predictive values (98.8% and 99.6%, respectively), make the GenomEra C. difficile assay an excellent option for toxigenic C. difficile detection in fecal specimens.
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Affiliation(s)
- Jari J Hirvonen
- Department of Clinical Microbiology, Vaasa Central Hospital, Vaasa, Finland.
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Kanerva M, Ollgren J, Voipio T, Mentula S, Lyytikäinen O. P029: Regional differences in Clostridium difficile infections (CDI) in relation to fluoroquinolone (FQ) and proton pump inhibitor (PPI) use, Finland, 2008-2011. Antimicrob Resist Infect Control 2013. [PMCID: PMC3688128 DOI: 10.1186/2047-2994-2-s1-p29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kanerva M, Mentula S, Virolainen-Julkunen A, Kärki T, Möttönen T, Lyytikäinen O. Reduction in Clostridium difficile infections in Finland, 2008–2010. J Hosp Infect 2013. [DOI: 10.1016/j.jhin.2012.09.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kusnetsov J, Neuvonen LK, Korpio T, Uldum SA, Mentula S, Putus T, Tran Minh NN, Martimo KP. Two Legionnaires' disease cases associated with industrial waste water treatment plants: a case report. BMC Infect Dis 2010; 10:343. [PMID: 21126333 PMCID: PMC3014939 DOI: 10.1186/1471-2334-10-343] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [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: 09/29/2010] [Accepted: 12/02/2010] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Finnish and Swedish waste water systems used by the forest industry were found to be exceptionally heavily contaminated with legionellae in 2005. CASE PRESENTATION We report two cases of severe pneumonia in employees working at two separate mills in Finland in 2006. Legionella serological and urinary antigen tests were used to diagnose Legionnaires' disease in the symptomatic employees, who had worked at, or close to, waste water treatment plants. Since the findings indicated a Legionella infection, the waste water and home water systems were studied in more detail. The antibody response and Legionella urinary antigen finding of Case A indicated that the infection had been caused by Legionella pneumophila serogroup 1. Case A had been exposed to legionellae while installing a pump into a post-clarification basin at the waste water treatment plant of mill A. Both the water and sludge in the basin contained high concentrations of Legionella pneumophila serogroup 1, in addition to serogroups 3 and 13. Case B was working 200 meters downwind from a waste water treatment plant, which had an active sludge basin and cooling towers. The antibody response indicated that his disease was due to Legionella pneumophila serogroup 2. The cooling tower was the only site at the waste water treatment plant yielding that serogroup, though water in the active sludge basin yielded abundant growth of Legionella pneumophila serogroup 5 and Legionella rubrilucens. Both workers recovered from the disease. CONCLUSION These are the first reported cases of Legionnaires' disease in Finland associated with industrial waste water systems.
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Affiliation(s)
- Jaana Kusnetsov
- National Institute for Health and Welfare (THL), Water and Health Unit, P.O.Box 95, FI-70701 Kuopio, Finland
| | | | | | | | - Silja Mentula
- National Institute for Health and Welfare, Bacteriology Unit, Helsinki, Finland
| | | | - Nhu Nguyen Tran Minh
- National Institute for Health and Welfare, Epidemiologic Surveillance and Response Unit, Helsinki, Finland
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Mentula S, Tuure T, Koskenala R, Korpela R, Könönen E. Microbial composition and fecal fermentation end products from colicky infants – a probiotic supplementation pilot. Microbial Ecology in Health and Disease 2009. [DOI: 10.1080/08910600801933846] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Silja Mentula
- Anaerobe Reference Laboratory, Department of Bacterial and Inflammatory Diseases, National Public Health Institute (KTL), Helsinki, Finland
| | - Tuula Tuure
- Research and Development Centre Valio Ltd, Helsinki, Finland
| | - Raita Koskenala
- Department of Applied Chemistry and Microbiology, University of Helsinki, Helsinki, Finland
| | - Riitta Korpela
- Research and Development Centre Valio Ltd, Helsinki, Finland
- Institute of Biomedicine, Pharmacology, University of Helsinki, Helsinki, Finland
| | - Eija Könönen
- Anaerobe Reference Laboratory, Department of Bacterial and Inflammatory Diseases, National Public Health Institute (KTL), Helsinki, Finland
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Könönen E, Rasinperä M, Virolainen A, Mentula S, Lyytikäinen O. Diagnostic trends in Clostridium difficile detection in Finnish microbiology laboratories. Anaerobe 2009; 15:261-5. [PMID: 19591954 DOI: 10.1016/j.anaerobe.2009.06.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2008] [Revised: 04/04/2009] [Accepted: 06/29/2009] [Indexed: 11/16/2022]
Abstract
Due to increased interest directed to Clostridium difficile-associated infections, a questionnaire survey of laboratory diagnostics of toxin-producing C. difficile was conducted in Finland in June 2006. Different aspects pertaining to C. difficile diagnosis, such as requests and criteria used for testing, methods used for its detection, yearly changes in diagnostics since 1996, and the total number of investigations positive for C. difficile in 2005, were asked in the questionnaire, which was sent to 32 clinical microbiology laboratories, including all hospital-affiliated and the relevant private clinical microbiology laboratories in Finland. The situation was updated by phone and email correspondence in September 2008. In June 2006, 28 (88%) laboratories responded to the questionnaire survey; 24 of them reported routinely testing requested stool specimens for C. difficile. Main laboratory methods included toxin detection (21/24; 88%) and/or anaerobic culture (19/24; 79%). In June 2006, 18 (86%) of the 21 laboratories detecting toxins directly from feces, from the isolate, or both used methods for both toxin A (TcdA) and B (TcdB), whereas only one laboratory did so in 1996. By September 2008, all of the 23 laboratories performing diagnostics for C. difficile used methods for both TcdA and TcdB. In 2006, the number of specimens processed per 100,000 population varied remarkably between different hospital districts. In conclusion, culturing C. difficile is common and there has been a favorable shift in toxin detection practice in Finnish clinical microbiology laboratories. However, the variability in diagnostic activity reported in 2006 creates a challenge for national monitoring of the epidemiology of C. difficile and related diseases.
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Affiliation(s)
- Eija Könönen
- Department of Infectious Disease Surveillance and Control, National Institute for Health and Welfare (THL), PO Box 30, FI-00271 Helsinki, Finland.
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Tarkkanen AM, Heinonen T, Jõgi R, Mentula S, van der Rest ME, Donskey CJ, Kemppainen T, Gurbanov K, Nord CE. P1A recombinant beta-lactamase prevents emergence of antimicrobial resistance in gut microflora of healthy subjects during intravenous administration of ampicillin. Antimicrob Agents Chemother 2009; 53:2455-62. [PMID: 19307374 PMCID: PMC2687246 DOI: 10.1128/aac.00853-08] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2008] [Revised: 08/31/2008] [Accepted: 03/08/2009] [Indexed: 01/19/2023] Open
Abstract
Ipsat P1A is a recombinant beta-lactamase which degrades antibiotic residue in the gastrointestinal tract. In an open-label, single-center controlled trial, 36 healthy subjects were randomized to receive (i) ampicillin (1 g intravenously [i.v.] every 6 h [q6h]), (ii) oral P1A recombinant beta-lactamase (8.2 mg q6h), or (iii) ampicillin (1 g i.v. q6h) in combination with oral P1A recombinant beta-lactamase (8.2 mg q6h) for 5 days. Fecal samples were collected before treatment, during treatment (days 3 to 5), and at follow-up (day 12). The primary end points were (i) changes in gastrointestinal microflora (determined by temperature gradient gel electrophoresis [TGGE]) and (ii) emergence of bacterial resistance (determined by conventional microbiology and PCR of TEM beta-lactamase genes). Thirty-five subjects completed the study. The mean similarity percentages of TGGE profiles between baseline and each treatment day sample were significantly lower for the ampicillin group than for the group receiving ampicillin plus P1A recombinant beta-lactamase on days 3, 4, and 5 (P < 0.001). Compared with the ampicillin group, subjects receiving ampicillin plus P1A recombinant beta-lactamase had significantly fewer ampicillin-resistant coliforms on days 3, 4, and 5 and at follow-up (P < or = 0.001) and fewer TEM beta-lactamase genes on days 3, 4, and 5 (P < 0.02). P1A recombinant beta-lactamase was safe and well tolerated. In healthy subjects, P1A recombinant beta-lactamase prevents ampicillin-induced alterations in intestinal microflora, emergence of resistance, and the number of TEM genes.
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Mentula S, Tuure T, Koskenala R, Korpela R, Könönen E. Microbial composition and fecal fermentation end products from colicky infants - a probiotic supplementation pilot. Microbial Ecology in Health & Disease 2008. [DOI: 10.3402/mehd.v20i1.7638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Lyytikäinen O, Mentula S, Könönen E, Kotila S, Tarkka E, Anttila VJ, Mattila E, Kanerva M, Vaara M, Valtonen V. First isolation of Clostridium difficile PCR ribotype 027 in Finland. ACTA ACUST UNITED AC 2007; 12:E071108.2. [PMID: 18005648 DOI: 10.2807/esw.12.45.03303-en] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
On 18 October 2007, the first case of Clostridium difficile PCR ribotype 027-associated disease was detected in Finland.
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Affiliation(s)
- O Lyytikäinen
- National Public Health Institute (KTL), Helsinki, Finland.
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Mentula S, Virtanen T, Kanervo-Nordström A, Harmoinen J, Westermarck E, Rautio M, Huovinen P, Könönen E. Relatedness of Escherichia coli strains with different susceptibility patterns isolated from beagle dogs during ampicillin treatment. Int J Antimicrob Agents 2006; 27:46-50. [PMID: 16324827 DOI: 10.1016/j.ijantimicag.2005.09.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2005] [Accepted: 09/14/2005] [Indexed: 10/25/2022]
Abstract
The aim of this study was to investigate the effects of ampicillin treatment on selection and diversity of ampicillin-resistant intestinal Escherichia coli in beagles treated with ampicillin, ampicillin + beta-lactamase (targeted to degrade antibiotic residues in the gut) or placebo. Selected faecal (n = 339) and jejunal (n = 63) E. coli isolates with known resistance patterns were typed using pulsed-field gel electrophoresis (PFGE). Among the 25 detected PFGE types, ampicillin resistance was detected in 6, none of which was dominant over others among the dogs. The resistant types increased especially in the ampicillin group, whilst beta-lactamase inhibited their emergence. Selection of genetically unrelated resistant strains rather than emerging resistance among previously susceptible strains accounts for increasing resistance rates during ampicillin treatment.
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Affiliation(s)
- Silja Mentula
- Anaerobe Reference Laboratory, Department of Bacterial and Inflammatory Diseases, National Public Health Institute (KTL), Helsinki, Finland.
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Mentula S, Harmoinen J, Heikkilä M, Westermarck E, Rautio M, Huovinen P, Könönen E. Comparison between cultured small-intestinal and fecal microbiotas in beagle dogs. Appl Environ Microbiol 2005; 71:4169-75. [PMID: 16085799 PMCID: PMC1183360 DOI: 10.1128/aem.71.8.4169-4175.2005] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The microbiota of the small intestine is poorly known because of difficulties in sampling. In this study, we examined whether the organisms cultured from the jejunum and feces resemble each other. Small-intestinal fluid samples were collected from 22 beagle dogs with a permanent jejunal fistula in parallel with fecal samples. In addition, corresponding samples from seven of the dogs were collected during a 4-week period (days 4, 10, 14, and 28) to examine the stability of the microbiota. In the jejunal samples, aerobic/facultative and anaerobic bacteria were equally represented, whereas anaerobes dominated in the fecal samples. Despite lower numbers of bacteria in the jejunum (range, 10(2) to 10(6) CFU/g) than in feces (range, 10(8) to 10(11) CFU/g), some microbial groups were more prevalent in the small intestine: staphylococci, 64% versus 36%; nonfermentative gram-negative rods, 27% versus 9%; and yeasts, 27% versus 5%, respectively. In contrast, part of the fecal dominant microbiota (bile-resistant Bacteroides spp., Clostridium hiranonis-like organisms, and lactobacilli) was practically absent in the jejunum. Many species were seldom isolated simultaneously from both sample types, regardless of their overall prevalence. In conclusion, the small intestine contains a few bacterial species at a time with vastly fluctuating counts, opposite to the results obtained for the colon, where the major bacterial groups remain relatively constant over time. Qualitative and quantitative differences between the corresponding jejunal and fecal samples indicate the inability of fecal samples to represent the microbiotas present in the upper gut.
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Affiliation(s)
- Silja Mentula
- Anaerobe Reference Laboratory, National Public Health Institute (KTL), Mannerheimintie 166, FIN-00300 Helsinki, Finland.
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Mentula S, Harmoinen J, Koski P, Westermarck E, Rautio M, Huovinen P, Könönen E. Inhibition of ampicillin-induced emergence of resistance in intestinal coliforms by targeted recombinant β-lactamase. Int J Antimicrob Agents 2004; 24:555-61. [PMID: 15555877 DOI: 10.1016/j.ijantimicag.2004.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2004] [Accepted: 07/09/2004] [Indexed: 10/26/2022]
Abstract
The aim of the present study was to determine whether oral targeted recombinant beta-lactamase (TRBL) administration could overcome the development of ampicillin-induced resistance in the gut microbiota. Eighteen laboratory beagles with permanent jejunal fistula were randomised to receive ampicillin + placebo, ampicillin + TRBL or placebo. A total of 982 coliform isolates, collected from jejunal and faecal samples before, during and after the treatment were tested against nine antimicrobials. The proportion of ampicillin resistance (multi-resistance) among coliform isolates increased from 20 to 36% in the ampicillin + placebo group but far less, 20-36%, in the ampicillin + TRBL group. These results indicate that TRBL may prevent the emergence of beta-lactam-associated resistance in coliforms in the gut.
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Affiliation(s)
- Silja Mentula
- Anaerobe Reference Laboratory, Department of Microbiology, National Public Health Institute (KTL), Mannerheimintie 166, FIN-00300 Helsinki, Finland.
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Harmoinen J, Mentula S, Heikkilä M, van der Rest M, Rajala-Schultz PJ, Donskey CJ, Frias R, Koski P, Wickstrand N, Jousimies-Somer H, Westermarck E, Lindevall K. Orally administered targeted recombinant Beta-lactamase prevents ampicillin-induced selective pressure on the gut microbiota: a novel approach to reducing antimicrobial resistance. Antimicrob Agents Chemother 2004; 48:75-9. [PMID: 14693521 PMCID: PMC310163 DOI: 10.1128/aac.48.1.75-79.2004] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2003] [Revised: 09/06/2003] [Accepted: 10/06/2003] [Indexed: 11/20/2022] Open
Abstract
Antibiotics that are excreted into the intestinal tract promote antibiotic resistance by exerting selective pressure on the gut microbiota. Using a beagle dog model, we show that an orally administered targeted recombinant beta-lactamase enzyme eliminates the portion of parenteral ampicillin that is excreted into the small intestine, preventing ampicillin-induced changes to the fecal microbiota without affecting ampicillin levels in serum. In dogs receiving ampicillin, significant disruption of the fecal microbiota and the emergence of ampicillin-resistant Escherichia coli and TEM genes were observed, whereas in dogs treated with ampicillin in combination with an oral beta-lactamase, these did not occur. These results suggest a new strategy for reducing antimicrobial resistance in humans.
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Affiliation(s)
- Jaana Harmoinen
- Faculty of Veterinary Medicine, Department of Clinical Veterinary Sciences, 00014-University of Helsinki, Helsinki, Finland.
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Kuisma J, Mentula S, Luukkonen P, Jarvinen H, Kahri A, Farkkila M. Factors associated with ileal mucosal morphology and inflammation in patients with ileal pouch-anal anastomosis for ulcerative colitis. Dis Colon Rectum 2003; 46:1476-83. [PMID: 14605565 DOI: 10.1007/s10350-004-6796-6] [Citation(s) in RCA: 22] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE Pouchitis has been associated with abnormal bacterial flora responding to antibiotics. Dietary factors may play a role in modifying the qualitative and quantitative components of the microflora. We evaluated interactions between nutritional factors, fecal and mucosal bacterial flora, and mucosal morphology in patients with a history of pouchitis compared with patients with optimal outcome at least five years after ileal pouch-anal anastomosis for ulcerative colitis. METHODS Thirty-two patients were enrolled in the study: 11 (7 males; mean age, 49.8 years) with optimal outcome and 21 (11 males; mean age, 47.3 years) with pouchitis history. A seven-day food diary was recorded, endoscopy performed, and biopsies taken from the pouch for histology, mucin staining, and bacterial culture. Fresh fecal samples were quantitatively cultured, and fecal bile acids analyzed by gas-liquid chromatography. RESULTS No differences existed in mean nutrient intake, composition of fecal bile acids, or microbial tissue biopsy cultures between the groups with and without pouchitis. Those with optimal outcome tended to have more benign disease course of ulcerative colitis than patients with pouchitis. In those patients, fecal concentrations (log10 colony-forming unit/g) of anaerobes and aerobes were significantly higher (P = 0.007). Degree of villous atrophy and colonic metaplasia were both associated with fecal anaerobic flora. Low intake of lactose was associated with sulfomucin predominance. A negative correlation existed between fecal aerobes and dietary lactose consumption. CONCLUSIONS A higher total load of fecal anaerobic bacterial flora is strongly associated with degree of colonic metaplasia, villous atrophy, and inflammation activity after surgery for ulcerative colitis. An association existed between dietary lactose, fecal bacteria, and pouch morphology. Lactose may have prebiotic properties.
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Affiliation(s)
- J Kuisma
- Department of Gastroenterology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
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Abstract
BACKGROUND Preliminary trials of probiotics in preventing recurrent chronic pouchitis have been encouraging. AIM To investigate the efficacy of Lactobacillus GG supplementation as primary therapy for ileal pouch inflammation, and its effect on the microbial flora. METHODS Twenty patients, with a previous history of pouchitis and endoscopic inflammation, were recruited for a prospective, randomized, double-blind, placebo-controlled trial of Lactobacillus GG supplementation (10 LGG, 10 placebo) in two gelatine capsules [(0.5-1) x 10(10) colony-forming units/capsule] b.d. for 3 months. Quantitative bacterial culture of fresh faecal samples and biopsies taken from the pouch and afferent limb was performed before and after supplementation. RESULTS Lactobacillus GG supplementation changed the pouch intestinal flora by increasing the ratio of total faecal lactobacilli to total faecal anaerobes (P = 0.03) and enhancing the frequency of lactobacilli-positive cultures in the pouch and afferent limb mucosal biopsy samples. However, only 40% of patients were colonized with Lactobacillus GG. No differences were observed between the groups with regard to the mean pouchitis disease activity index or the total anaerobes or aerobes of faecal or tissue biopsy samples. CONCLUSIONS A single-strain probiotic bacterium supplement of Lactobacillus GG changed the pouch intestinal bacterial flora, but was ineffective as primary therapy for a clinical or endoscopic response. More clinical trials are needed to evaluate the right placement and dosage of probiotics within a treatment regimen for pouchitis.
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Affiliation(s)
- J Kuisma
- Department of Gastroenterology, Helsinki University Central Hospital, Helsinki, Finland.
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Skogberg K, Nuorti JP, Saxen H, Kusnetsov J, Mentula S, Fellman V, Mäki-Petäys N, Jousimies-Somer H. A newborn with domestically acquired legionnaires disease confirmed by molecular typing. Clin Infect Dis 2002; 35:e82-5. [PMID: 12355396 DOI: 10.1086/342886] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2002] [Revised: 06/10/2002] [Indexed: 11/03/2022] Open
Abstract
Legionella pneumophila serogroup 6 was recovered from a bronchoalveolar lavage specimen from a 1-week-old, full-term newborn with pneumonia, as well as from water samples from the maternity hospital and the newborn's home (an apartment). Amplified fragment-length polymorphism typing revealed that the strains isolated from the newborn and her home were indistinguishable from each other but were clearly different from the hospital and control strains. To our knowledge, this is the first report of domestic acquisition of legionnaires disease in a newborn to have been confirmed by molecular typing.
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Affiliation(s)
- Kirsi Skogberg
- Department of Infectious Disease Epidemiology, National Public Health Institute, Helsinki, Finland
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Fry NK, Bangsborg JM, Bergmans A, Bernander S, Etienne J, Franzin L, Gaia V, Hasenberger P, Baladrón Jiménez B, Jonas D, Lindsay D, Mentula S, Papoutsi A, Struelens M, Uldum SA, Visca P, Wannet W, Harrison TG. Designation of the European Working Group on Legionella Infection (EWGLI) amplified fragment length polymorphism types of Legionella pneumophila serogroup 1 and results of intercentre proficiency testing Using a standard protocol. Eur J Clin Microbiol Infect Dis 2002; 21:722-8. [PMID: 12415471 DOI: 10.1007/s10096-002-0790-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The utility of amplified fragment length polymorphism (AFLP) analysis as a genotyping method for the epidemiological typing of Legionella pneumophila serogroup 1 has been previously demonstrated. This study (i). reports recommendations for the designation of the European Working Group on Legionella Infections (EWGLI) AFLP types, (ii). describes the EWGLI AFLP types identified for the 130 strains in the EWGLI culture collection, and (iii). reports the results of a newly introduced international programme of proficiency testing. Following preliminary analysis of 20 epidemiologically unrelated isolates, 16 major AFLP types were identified. A coded proficiency panel, comprising 12 additional isolates representing 9 of these 16 AFLP types, was sent to 17 centres in 14 European countries where it was analysed following a previously determined standard protocol. The identity of each coded strain (recorded as AFLP type 001-016 or untypeable) was determined by participants with reference to these 16 AFLP types, either visually or using gel analysis software where available, and reported to the coordinating centre. Nine of the 12 strains, including an epidemiologically related pair and two pairs of unrelated isolates of the same type, were correctly identified to the correct AFLP type by all or all but one of the participants. Seven laboratories correctly identified all 12 isolates, and a further seven laboratories correctly identified 11. Type identification scores ranged from 75% (1 centre), 83% (2 centres), and 92% (7 centres) to 100% (7 centres). The AFLP method as described is robust and rapid and allows the genotypic comparison of isolates of Legionella pneumophila between different testing centres without the need for exchange of the strains studied.
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Affiliation(s)
- N K Fry
- Respiratory and Systemic Infection Laboratory, 61 Colindale Avenue, London NW9 5HT, UK.
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Helbig JH, Bernander S, Castellani Pastoris M, Etienne J, Gaia V, Lauwers S, Lindsay D, Lück PC, Marques T, Mentula S, Peeters MF, Pelaz C, Struelens M, Uldum SA, Wewalka G, Harrison TG. Pan-European study on culture-proven Legionnaires' disease: distribution of Legionella pneumophila serogroups and monoclonal subgroups. Eur J Clin Microbiol Infect Dis 2002; 21:710-6. [PMID: 12415469 DOI: 10.1007/s10096-002-0820-3] [Citation(s) in RCA: 198] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This pan-European study included unrelated strains of Legionella pneumophila obtained from 1335 cases of Legionnaires' disease. The isolates were serotyped into the serogroups 1 to 15 by monoclonal antibodies (MAb) and/or rabbit antisera. Additionally, MAb subgrouping was undertaken for isolates belonging to serogroups 1, 4, and 5. Monoclonal types of serogroup 1 were subdivided as having, or not having, the virulence-associated epitope recognized by the MAb 3/1 (Dresden Panel). This epitope is not present on strains belonging to any other serogroups. Taking all Legionella incidents together, MAb 3/1-positive cases were most frequent (66.8%); 11.7% of the isolates belonged to MAb 3/1-negative serogroup 1 subgroups and 21.5% to other serogroups, with serogroups 3 and 6 predominating. Among all serotypes discriminated in this study, monoclonal subtype Philadelphia was the most frequent. If categories of infection were considered, the proportion of MAb 3/1-negative strains differed significantly ( P<0.0005) between community-acquired cases (139/510; 27.3%) and travel-associated (42/295; 14.2%) or hospital-acquired infections (176/329; 53.5%). Moreover, taking distribution in different European areas into account, the proportion of MAb 3/1-negative strains was significantly higher in the Scandinavian region than in the Mediterranean countries or the UK for both community-acquired (48.7% vs. 18.6% or 12.0%; P<0.0005) and nosocomial cases (87.7% vs. 32.6% or 52.6%; P</=0.0007).
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Affiliation(s)
- J H Helbig
- Institut Medizinische Mikrobiologie und Hygiene, Medizinische Fakultät TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany.
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Väkeväinen S, Mentula S, Nuutinen H, Salmela KS, Jousimies-Somer H, Färkkilä M, Salaspuro M. Ethanol-derived microbial production of carcinogenic acetaldehyde in achlorhydric atrophic gastritis. Scand J Gastroenterol 2002; 37:648-55. [PMID: 12126241 DOI: 10.1080/00365520212500] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Acetaldehyde is a local carcinogen in the digestive tract in humans. Atrophic gastritis leads to microbial colonization of the stomach, which could enhance microbial production of acetaldehyde from ethanol. The aim of the study was to study microbial ethanol metabolism and acetaldehyde production in the stomach of achlorhydric atrophic gastritis patients. METHODS For the in vivo study, glucose or ethanol was infused via a nasogastric tube to the stomach of seven achlorhydric atrophic gastritis patients and five healthy controls. Gastric juice samples for ethanol and acetaldehyde determinations and microbial analysis were obtained at 30 and 60 min after the infusions. For the in vitro study, gastric juice samples from 14 atrophic gastritis patients and 16 controls were obtained during gastroscopy, whereafter the samples were incubated for 2 h with 1% ethanol at 37 degrees C and acetaldehyde was determined. RESULTS Minor endogenous ethanol and acetaldehyde concentrations were detected after glucose infusion in the gastric juice of four atrophic gastritis patients. After ethanol infusion, the mean intragastric acetaldehyde level of the atrophic gastritis patients was 4.5-fold at 30 min and 6.5-fold at 60 min compared to controls. In vitro, the difference between the study groups was even higher, 7.6-fold. A vast selection of oral bacterial species and some Enterobacteriaceae and yeasts were presented in the gastric juice of atrophic gastritis patients. CONCLUSIONS Microbial ethanol metabolism leads to high intragastric acetaldehyde levels after ethanol drinking in achlorhydric atrophic gastritis patients. This could be one of the factors responsible for enhanced gastric cancer risk among atrophic gastritis patients.
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Affiliation(s)
- S Väkeväinen
- Research Unit of Substance Abuse Medicine, Biomedicum Helsinki, University of Helsinki, Finland
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