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Quinn MW, Daisley BA, Vancuren SJ, Bouchema A, Niño E, Reid G, Thompson GJ, Allen-Vercoe E. Apirhabdus apintestini gen. nov., sp. nov., a member of a novel genus of the family Enterobacteriaceae, isolated from the gut of the western honey bee Apis mellifera. Int J Syst Evol Microbiol 2024; 74. [PMID: 38652096 DOI: 10.1099/ijsem.0.006346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024] Open
Abstract
A Gram-negative, motile, rod-shaped bacterial strain, CA-0114T, was isolated from the midgut of a western honey bee, Apis mellifera. The isolate exhibited ≤96.43 % 16S rRNA gene sequence identity (1540 bp) to members of the families Enterobacteriaceae and Erwiniaceae. Phylogenetic trees based on genome blast distance phylogeny and concatenated protein sequences encoded by conserved genes atpD, fusA, gyrB, infB, leuS, pyrG and rpoB separated the isolate from other genera forming a distinct lineage in the Enterobacteriaceae. In both trees, the closest relatives were Tenebrionicola larvae YMB-R21T and Tenebrionibacter intestinalis BIT-L3T, which were isolated previously from Tenebrio molitor L., a plastic-eating mealworm. Digital DNA-DNA hybridization, orthologous average nucleotide identity and average amino acid identity values between strain CA-0114T and the closest related members within the Enterobacteriaceae were ≤23.1, 75.45 and 76.04 %, respectively. The complete genome of strain CA-0114T was 4 451669 bp with a G+C content of 52.12 mol%. Notably, the apparent inability of strain CA-0114T to ferment d-glucose, inositol and l-rhamnose in the API 20E system is unique among closely related members of the Enterobacteriaceae. Based on the results obtained through genotypic and phenotypic analysis, we propose that strain CA-0114T represents a novel species and genus within the family Enterobacteriaceae, for which we propose the name Apirhabdus apintestini gen. nov., sp. nov. (type strain CA-0114T=ATCC TSD-396T=DSM 116385T).
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Affiliation(s)
- Matthew W Quinn
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Brendan A Daisley
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada
- Department of Biology, Western University, London, ON, N6A 5C1, Canada
| | - Sarah J Vancuren
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Amira Bouchema
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Elina Niño
- Department of Entomology and Nematology, University of California, Davis, CA, 95616, USA
- University of California Agriculture and Natural Resources, Oakland, CA, 95618, USA
| | - Gregor Reid
- Department of Microbiology & Immunology, Western University, London, ON, N6A 5B7, Canada
| | - Graham J Thompson
- Department of Biology, Western University, London, ON, N6A 5C1, Canada
| | - Emma Allen-Vercoe
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada
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Waterlow NR, Cooper BS, Robotham JV, Knight GM. Antimicrobial resistance prevalence in bloodstream infection in 29 European countries by age and sex: An observational study. PLoS Med 2024; 21:e1004301. [PMID: 38484006 PMCID: PMC10939247 DOI: 10.1371/journal.pmed.1004301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 01/22/2024] [Indexed: 03/17/2024] Open
Abstract
BACKGROUND Antibiotic usage, contact with high transmission healthcare settings as well as changes in immune system function all vary by a patient's age and sex. Yet, most analyses of antimicrobial resistance (AMR) ignore demographic indicators and provide only country-level resistance prevalence values. This study aimed to address this knowledge gap by quantifying how resistance prevalence and incidence of bloodstream infection (BSI) varied by age and sex across bacteria and antibiotics in Europe. METHODS AND FINDINGS We used patient-level data collected as part of routine surveillance between 2015 and 2019 on BSIs in 29 European countries from the European Antimicrobial Resistance Surveillance Network (EARS-Net). A total of 6,862,577 susceptibility results from isolates with age, sex, and spatial information from 944,520 individuals were used to characterise resistance prevalence patterns for 38 different bacterial species and antibiotic combinations, and 47% of these susceptibility results were from females, with a similar age distribution in both sexes (mean of 66 years old). A total of 349,448 isolates from 2019 with age and sex metadata were used to calculate incidence. We fit Bayesian multilevel regression models by country, laboratory code, sex, age, and year of sample to quantify resistant prevalence and provide estimates of country-, bacteria-, and drug-family effect variation. We explore our results in greater depths for 2 of the most clinically important bacteria-antibiotic combinations (aminopenicillin resistance in Escherichia coli and methicillin resistance in Staphylococcus aureus) and present a simplifying indicative index of the difference in predicted resistance between old (aged 100) and young (aged 1). At the European level, we find distinct patterns in resistance prevalence by age. Trends often vary more within an antibiotic family, such as fluroquinolones, than within a bacterial species, such as Pseudomonas aeruginosa. Clear resistance increases by age for methicillin-resistant Staphylococcus aureus (MRSA) contrast with a peak in resistance to several antibiotics at approximately 30 years of age for P. aeruginosa. For most bacterial species, there was a u-shaped pattern of infection incidence with age, which was higher in males. An important exception was E. coli, for which there was an elevated incidence in females between the ages of 15 and 40. At the country-level, subnational differences account for a large amount of resistance variation (approximately 38%), and there are a range of functional forms for the associations between age and resistance prevalence. For MRSA, age trends were mostly positive, with 72% (n = 21) of countries seeing an increased resistance between males aged 1 and 100 years and a greater change in resistance in males. This compares to age trends for aminopenicillin resistance in E. coli which were mostly negative (males: 93% (n = 27) of countries see decreased resistance between those aged 1 and 100 years) with a smaller change in resistance in females. A change in resistance prevalence between those aged 1 and 100 years ranged up to 0.51 (median, 95% quantile of model simulated prevalence using posterior parameter ranges 0.48, 0.55 in males) for MRSA in one country but varied between 0.16 (95% quantile 0.12, 0.21 in females) to -0.27 (95% quantile -0.4, -0.15 in males) across individual countries for aminopenicillin resistance in E. coli. Limitations include potential bias due to the nature of routine surveillance and dependency of results on model structure. CONCLUSIONS In this study, we found that the prevalence of resistance in BSIs in Europe varies substantially by bacteria and antibiotic over the age and sex of the patient shedding new light on gaps in our understanding of AMR epidemiology. Future work is needed to determine the drivers of these associations in order to more effectively target transmission and antibiotic stewardship interventions.
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Affiliation(s)
- Naomi R. Waterlow
- Centre for Mathematical Modelling of Infectious Diseases, Department of Infectious Disease Epidemiology, EPH, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Ben S. Cooper
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Julie V. Robotham
- NIHR Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance at University of Oxford in Partnership with the UK Health Security Agency, Oxford, United Kingdom
| | - Gwenan Mary Knight
- Centre for Mathematical Modelling of Infectious Diseases, Department of Infectious Disease Epidemiology, EPH, London School of Hygiene and Tropical Medicine, London, United Kingdom
- AMR Centre, London School of Hygiene and Tropical Medicine, London, United Kingdom
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Yang M, Tao C. Diagnostic efficiency of the FilmArray blood culture identification (BCID) panel: a systematic review and meta-analysis. J Med Microbiol 2023; 72. [PMID: 37712641 DOI: 10.1099/jmm.0.001608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023] Open
Abstract
Introduction. The FilmArray blood culture identification panel (BCID) panel is a multiplex PCR assay with high sensitivity and specificity to identify the most common pathogens in bloodstream infections (BSIs).Hypothesis. We hypothesize that the BCID panel has good diagnostic performance for BSIs and can be popularized in clinical application.Aim: To provide summarized evidence for the diagnostic accuracy of the BCID panel for the identification of positive blood cultures.Methodology. We searched the MEDLINE, EMBASE and Cochrane databases through March 2021 and assessed the efficacy of the diagnostic test of the BCID panel. We performed a meta-analysis and calculated the summary sensitivity and specificity of the BCID panel. Systematic review protocols were registered in the International Prospective Register of Systematic Reviews (PROSPERO) (registration number CRD42021239176).Results. A total of 16 full-text articles were eligible for analysis. The overall sensitivities of the BCID panel on Gram-positive bacteria, Gram-negative bacteria and fungi were 97 % (95 % CI, 0.96-0.98), 100 % (95 % CI, 0.98-01.00) and 99 % (95 % CI, 0.87-1.00), respectively. The pooled diagnostic specificities were 99 % (95 % CI, 0.97-1.00), 100 % (95 % CI, 1.00-1.00) and 100 % (95 % CI, 1.00-1.00) for Gram-positive bacteria, Gram-negative bacteria and fungi, respectively.Conclusions. The BCID panel has high rule-in value for the early detection of BSI patients. The BCID panel can still provide valuable information for ruling out bacteremia or fungemia in populations with low pretest probability.
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Affiliation(s)
- Mei Yang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Chuanmin Tao
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
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Kassaian N, Nematbakhsh S, Yazdani M, Rostami S, Nokhodian Z, Ataei B. Epidemiology of Bloodstream Infections and Antimicrobial Susceptibility Pattern in ICU and Non-ICU Wards: A Four-Year Retrospective Study in Isfahan, Iran. Adv Biomed Res 2023; 12:106. [PMID: 37288028 PMCID: PMC10241621 DOI: 10.4103/abr.abr_320_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 02/01/2023] [Accepted: 02/05/2023] [Indexed: 06/09/2023] Open
Abstract
Background Bloodstream infections (BSIs) are one of the causes of morbidity and mortality in hospitalised patients. This study evaluated BSI's incidence, trend, antimicrobial susceptibility patterns and mortality in AL Zahra Hospital in Isfahan, Iran. Materials and Methods This retrospective study was conducted in AL Zahra Hospital from March 2017 to March 2021. The Iranian nosocomial infection surveillance system was used for data gathering. The data included demographic and hospital data, type of bacteria, and antibiotic susceptibility findings and were analysed in SPSS-18 software. Results The incidence of BSIs was 1.67% and 0.47%, and the mortality was 30% and 15.2% in the intensive care unit (ICU) and non-ICU wards, respectively. In the ICU, the mortality was correlated with the use of the catheter, type of organism and year of study, but in non-ICU, correlated with age, gender, use of the catheter, ward, year of study and duration between the incidence of BSIs and discharging/death. Staphylococcus epidermidis, Acinetobacter spp. and Klebsiella spp. were the most frequent germs isolated in all wards. Vancomycin (63.6%) and Gentamycin (37.7%) for ICU and Vancomycin (55.6%) and Meropenem (53.3) for other wards were the most sensitive antibiotics. Conclusion Despite the few rate of BSI in the last four years in AL Zahra Hospital, our data showed that its incidence and mortality in the ICU ward are significantly more than in other hospital wards. We recommend prospective multicentre studies to know the total incidence of BSI, local risk factors and patterns of pathogens causing BSI.
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Affiliation(s)
- Nazila Kassaian
- Nosocomial Infection Diseases Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Shadnosh Nematbakhsh
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammadreza Yazdani
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Soodabeh Rostami
- Nosocomial Infection Diseases Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Zary Nokhodian
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Behrooz Ataei
- Nosocomial Infection Diseases Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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Nielsen RT, Andersen CØ, Schønheyder HC, Petersen JH, Knudsen JD, Jarløv JO, Norredam M. Differences in the distribution of pathogens and antimicrobial resistance in bloodstream infections in migrants compared with non-migrants in Denmark. Infect Dis (Lond) 2023; 55:165-174. [PMID: 36548010 DOI: 10.1080/23744235.2022.2151643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND We wish to study disparities in bloodstream infections in migrants and non-migrants by comparing the distribution of pathogens and their resistance patterns in long-term migrants with that in non-migrants in Denmark. METHODS The study is based on a cohort of migrants, who received residency in Denmark between 1993 and 2015 and a control group of non-migrants. The cohort was linked to a database of bloodstream infections from 2000 to 2015 covering two regions in Denmark. First-time bloodstream infections in individuals ≥18 years of age at the time of sampling were included. We calculated odds ratios adjusted for age, sex, year of sampling, comorbidity, and place of acquisition (hospital- or community-acquired). RESULTS We identified 4,703 bloodstream infection cases. Family-reunified migrants and refugees had higher odds of Escherichia coli than non-migrants (OR 1.89 95%CI: 1.46-2.44 and OR 1.55 95%CI: 1.25-1.92) and lower odds of Streptococcus pneumoniae (OR 0.38 95%CI: 0.21-0.67 and OR 0.52 95%CI: 0.34-0.81). Differences in pathogen distribution were only prevalent in community-acquired bloodstream infections. Refugees had higher odds of Escherichia coli resistant to piperacillin-tazobactam, ciprofloxacin, and gentamicin compared with non-migrants. Family-reunified migrants had higher odds of Escherichia coli and other Enterobacterales resistant to ciprofloxacin. CONCLUSIONS Migrants had a higher proportion of community-acquired bloodstream infections with Escherichia coli as well as higher odds of bloodstream infections with resistant Escherichia coli compared with non-migrants. These novel results are relevant for improving migrant health by focussing on preventing and treating infections especially with Escherichia coli such as urinary tract and abdominal infections.
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Affiliation(s)
- Rikke Thoft Nielsen
- Department of Clinical Microbiology, Copenhagen University Hospital - Amager Hvidovre, Hvidovre, Denmark.,Research Centre for Migration, Ethnicity and Health, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | | | | | - Jørgen Holm Petersen
- Section of Biostatistics, Department of Public Health, University of Copenhagen, Denmark
| | | | - Jens Otto Jarløv
- Department of Clinical Microbiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark
| | - Marie Norredam
- Research Centre for Migration, Ethnicity and Health, Department of Public Health, University of Copenhagen, Copenhagen, Denmark.,Department of Infectious Diseases, Copenhagen University Hospital - Amager Hvidovre, Hvidovre, Denmark
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García-Rodríguez JF, Mariño-Callejo A. The factors associated with the trend in incidence of Bacteraemia and associated mortality over 30 years. BMC Infect Dis 2023; 23:69. [PMID: 36737678 PMCID: PMC9897612 DOI: 10.1186/s12879-023-08018-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 01/19/2023] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Studies have reported increased incidence of BSI over the past decades and indicate that it is necessary to investigate the causes. The aim of this study was to determine the factors affecting trends in the incidence of bacteraemias and associated mortality. METHODS We conducted a retrospective cohort study assessing prospectively collected data of all clinically significant bacteraemias between 1991 and 2020 in a 450-bed hospital. We determined the evolution of bacteraemia-associated incidence, adjusted 30-day mortality and performed multivariable logistic regression to compare the evolution of variables associated with mortality between 5-year periods. RESULTS 6777 episodes were included, 59.7% males, age 66.5 ± 18.2, 39.4% ≥ 75 years. The incidence total increased: 43.8/100,000/year in 1991-1995 to 205 in 2016-2020; community-acquired bacteraemia (24.9 to 139) and hospital-acquired (0.36/1000 inpatients-days to 1.09). Bacteraemia with source in vascular catheter, urinary and biliary tract increased. The 30-day mortality rate of patients was 1179/6777 (17.4%) in the whole series and population-adjusted mortality incidence increased from 11.4/100,000 in 1991-1996 to 28.4 in 2016-2020 (RR 2.49, 95% CI 2.01-3.08). Mortality was higher in men (18.2% vs 16.3%) and those over 74 years (22.2% vs 14.3%). Appropriate empirical antimicrobial treatment improved (66.5% to 73.1%), 30-day mortality of patients decreased from 26.1 to 13.9%. When comparing the evolution of the factors associated with mortality between 1991 and 1996 vs 2016-2020, the frequency of some variables associated with higher mortality increased: male sex (OR 1.38, 95% CI 1.10-1,74), age (OR 1.02, 1.01-10.3), immunosuppressive treatment (OR 3.1, 2.09-4.6), polymicrobial bacteraemia (OR 1.76, 1.12-2.79), and others decreased: severe sepsis/septic shock (OR 0.70, 0.52-0.93), spontaneous bacterial peritonitis in cirrhosis (OR 0.06, 0.02-0.23), endocarditis (OR 0.54, 0.35-0.83); on the other hand, the frequency of factors associated with lower mortality increased: urinary (OR 1.67, 95% CI 1.23-2.27) and bile tract source (OR 1.59, 1.04-2.43), and adequate empirical treatment (OR 1.42, 95% CI 1.10-1.83). CONCLUSIONS The incidence of bacteraemia increased due to more elderly, co-morbid patients undergoing procedures and more device related bacteraemia. The percentage of mortality decreased because adequate empirical treatment improved, decreased spontaneous bacterial peritonitis in cirrhosis and endocarditis, and increased bacteraemia of urinary and biliary tract source.
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Affiliation(s)
- J. F. García-Rodríguez
- Infectious Diseases Unit, Department of Internal Medicine, University Hospital of Ferrol, Sergas. Ferrol, 15405 A Coruña, Spain ,C/ San Amaro 10-12, 6º Derecha, Ferrol, 15403 A Coruña, Spain
| | - A. Mariño-Callejo
- Infectious Diseases Unit, Department of Internal Medicine, University Hospital of Ferrol, Sergas. Ferrol, 15405 A Coruña, Spain
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Schechner V, Wulffhart L, Temkin E, Feldman SF, Nutman A, Shitrit P, Schwaber MJ, Carmeli Y. One-year mortality and years of potential life lost following bloodstream infection among adults: A nation-wide population based study. Lancet Reg Health Eur 2022; 23:100511. [PMID: 36158527 PMCID: PMC9490098 DOI: 10.1016/j.lanepe.2022.100511] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Background Limited data exist on long-term consequences of bloodstream infections (BSIs). We aimed to examine incidence, 1-year mortality, and years of potential life lost (YPLL) following BSI. We estimated the relative contribution of hospital-onset BSI (HO-BSI) and antibiotic-resistant BSI to incidence, mortality and YPLL. Methods We used data from Israel's national BSI surveillance system (covering eight sentinel bacteria, comprising 70% of all BSIs) and the national death registry. Adults with BSI between January 2018 and December 2019 were included. The outcomes were all-cause 30-day and 1-year mortality, with no adjustment for co-morbidities. We calculated the age-standardized mortality rate and YPLL using the Global Burden of Disease reference population and life expectancy tables. Findings In total, 25,376 BSIs occurred over 2 years (mean adult population: 6,068,580). The annual incidence was 209·1 BSIs (95% CI 206·5–211·7) per 100,000 population. The case fatality rate was 25·6% (95% CI 25·0-26·2) at 30 days and 46·4% (95% CI 45·5-47·2) at 1 year. The hazard of death increased by 30% for each decade of age (HR=1·3 [95% CI 1·2-1·3]). The annual age-standardized mortality rate and YPLL per 100,000 were 50·8 (95% CI 49·7-51·9) and 1,012·6 (95% CI 986·9-1,038·3), respectively. HO-BSI (6,962 events) represented 27·4% (95% CI 26·9-28·0) of BSIs, 33·9% (95% CI 32·6-35·0) of deaths and 39·9% (95% CI 39·5-40·2) of YPLL. HO-BSI by drug-resistant bacteria (3,072 events) represented 12·1% (95% CI 11·7-12·5) of BSIs, 15·6% (95% CI 14·7-16·5) of deaths, and 18·4% (95% CI 18·1-18·7) of YPLL. Interpretation One-year mortality following BSI is high. The burden of BSI is similar to that of ischemic stroke. HO-BSI and drug-resistant BSI contribute disproportionately to BSI mortality and YPLL. Funding None.
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Caruana G, Kritikos A, Vocat A, Luraschi A, Delarze E, Sturm A, Pla Verge M, Jozwiak G, Kushwaha S, Delaloye J, Cichocka D, Greub G. Investigating nanomotion-based technology (Resistell AST) for rapid antibiotic susceptibility testing among adult patients admitted to a tertiary-care hospital with Gram-negative bacteraemia: protocol for a prospective, observational, cross-sectional, single-arm study. BMJ Open 2022; 12:e064016. [PMID: 36410804 PMCID: PMC9680170 DOI: 10.1136/bmjopen-2022-064016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Effective treatment of bloodstream infections (BSIs) is relying on rapid identification of the causing pathogen and its antibiotic susceptibility. Still, most commercially available antibiotic susceptibility testing (AST) methods are based on monitoring bacterial growth, thus impacting the time to results. The Resistell AST is based on a new technology measuring the nanomotion caused by physiologically active bacterial cells and detecting the changes in nanomotion caused by the exposure to a drug. METHODS AND ANALYSIS This is a single-centre, prospective, cross-sectional, single-arm diagnostic accuracy study to determine the agreement of the Resistell AST on Gram-negative bacteria isolated from blood cultures among patients admitted to a tertiary-care hospital with the reference method. Up to 300 patients will be recruited. Starting with a pilot phase, enrolling 10%-20% of the subjects and limited to Escherichia coli BSI tested for ceftriaxone susceptibility, the main phase will follow, extending the study to Klebsiella pneumoniae and ciprofloxacin. ETHICS AND DISSEMINATION This study has received ethical approval from the Swiss Ethics Committees (swissethics, project 2020-01622). All the case report forms and clinical samples will be assigned a study code by the local investigators and stored anonymously at the reference centre (Lausanne University Hospital). The results will be broadly distributed through conference presentations and peer-reviewed publications. TRIAL REGISTRATION NUMBER ClinicalTrials.gov Registry (NCT05002413).
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Affiliation(s)
- Giorgia Caruana
- Institute of Microbiology, Department of Laboratory Medicine and Pathology, Lausanne University Hospital, Lausanne, Switzerland
| | - Antonios Kritikos
- Institute of Microbiology, Department of Laboratory Medicine and Pathology, Lausanne University Hospital, Lausanne, Switzerland
| | - Anthony Vocat
- Institute of Microbiology, Department of Laboratory Medicine and Pathology, Lausanne University Hospital, Lausanne, Switzerland
| | | | | | | | | | | | | | | | | | - Gilbert Greub
- Institute of Microbiology, Department of Laboratory Medicine and Pathology, Lausanne University Hospital, Lausanne, Switzerland
- Department of Internal Medicine, Service of Infectious Diseases, Lausanne University Hospital, Lausanne, Switzerland
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Geurtsen J, de Been M, Weerdenburg E, Zomer A, McNally A, Poolman J. Genomics and pathotypes of the many faces of Escherichia coli. FEMS Microbiol Rev 2022; 46:6617594. [PMID: 35749579 PMCID: PMC9629502 DOI: 10.1093/femsre/fuac031] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 06/22/2022] [Indexed: 01/09/2023] Open
Abstract
Escherichia coli is the most researched microbial organism in the world. Its varied impact on human health, consisting of commensalism, gastrointestinal disease, or extraintestinal pathologies, has generated a separation of the species into at least eleven pathotypes (also known as pathovars). These are broadly split into two groups, intestinal pathogenic E. coli (InPEC) and extraintestinal pathogenic E. coli (ExPEC). However, components of E. coli's infinite open accessory genome are horizontally transferred with substantial frequency, creating pathogenic hybrid strains that defy a clear pathotype designation. Here, we take a birds-eye view of the E. coli species, characterizing it from historical, clinical, and genetic perspectives. We examine the wide spectrum of human disease caused by E. coli, the genome content of the bacterium, and its propensity to acquire, exchange, and maintain antibiotic resistance genes and virulence traits. Our portrayal of the species also discusses elements that have shaped its overall population structure and summarizes the current state of vaccine development targeted at the most frequent E. coli pathovars. In our conclusions, we advocate streamlining efforts for clinical reporting of ExPEC, and emphasize the pathogenic potential that exists throughout the entire species.
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Affiliation(s)
- Jeroen Geurtsen
- Janssen Vaccines and Prevention B.V., 2333 Leiden, the Netherlands
| | - Mark de Been
- Janssen Vaccines and Prevention B.V., 2333 Leiden, the Netherlands
| | | | - Aldert Zomer
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584 Utrecht, the Netherlands
| | - Alan McNally
- Institute of Microbiology and Infection, College of Medical and Dental Sciences, University of Birmingham, B15 2TT Birmingham, United Kingdom
| | - Jan Poolman
- Janssen Vaccines and Prevention B.V., 2333 Leiden, the Netherlands
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Ranasinghe A, Henderson A, Cottrell K, Tan CSE, Burnard D, Kato H, Paterson DL, Harris PNA. Determining the in vitro susceptibility of tebipenem, an oral carbapenem, against third-generation cephalosporin-resistant Escherichia coli and Klebsiella pneumoniae isolated from bloodstream infections. JAC Antimicrob Resist 2022; 4:dlac105. [PMID: 36196442 PMCID: PMC9524565 DOI: 10.1093/jacamr/dlac105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 09/08/2022] [Indexed: 11/29/2022] Open
Abstract
Background Antimicrobials for bloodstream infections due to ESBL- and AmpC-producing Escherichia coli and Klebsiella pneumoniae are significantly limited due to widespread antimicrobial resistance. Tebipenem, an oral carbapenem, exhibits stability against these resistance mechanisms and may prove an attractive alternative. Methods The in vitro susceptibility of tebipenem was assessed against previously whole-genome sequenced ESBL- and AmpC-producing E. coli (274 isolates) and K. pneumoniae (42 isolates) derived from bloodstream infections using broth microdilution testing. Resulting tebipenem MICs were compared with those of other carbapenems previously tested against the isolate collection. Tebipenem activity was also compared against those isolates expressing co-resistance to the common oral antibiotics ciprofloxacin and trimethoprim/sulfamethoxazole. Results The tebipenem MIC90 value was found to be 0.03 mg/L for E. coli and 0.125 mg/L for K. pneumoniae. For E. coli, the tebipenem MIC90 value was equivalent to that of meropenem, 2-fold lower than that of doripenem, and 8-fold and 4-fold lower than that of imipenem and ertapenem, respectively. For K. pneumoniae, the tebipenem MIC90 value was 2-fold higher than that of meropenem, equivalent to that of doripenem, and 4-fold and 2-fold lower than that of imipenem and ertapenem, respectively. Tebipenem MICs were also unaffected by the expression of co-resistance to ciprofloxacin and trimethoprim/sulfamethoxazole. Conclusions The in vitro activity of tebipenem was unaffected by the production of ESBL and AmpC enzymes. Tebipenem also retained its activity against those isolates expressing co-resistance to ciprofloxacin and trimethoprim/sulfamethoxazole. These findings therefore highlight tebipenem as a potential option for the treatment of invasive MDR infections.
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Affiliation(s)
- Ama Ranasinghe
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus , Brisbane , Australia
| | - Andrew Henderson
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus , Brisbane , Australia
- Infection Management Services, Princess Alexandra Hospital , Brisbane , Australia
| | - Kyra Cottrell
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus , Brisbane , Australia
| | - Cindy S E Tan
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus , Brisbane , Australia
| | - Delaney Burnard
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus , Brisbane , Australia
| | - Hideo Kato
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus , Brisbane , Australia
| | - David L Paterson
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus , Brisbane , Australia
- Department of Infectious Diseases, Royal Brisbane and Women’s Hospital , Brisbane , Australia
| | - Patrick N A Harris
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus , Brisbane , Australia
- Central Microbiology, Pathology Queensland, Royal Brisbane and Women’s Hospital , Brisbane , Australia
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11
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Dow G, MacLaggan T, Allard J. Impact of a bloodstream infection stewardship program in hospitalized patients. JOURNAL OF THE ASSOCIATION OF MEDICAL MICROBIOLOGY AND INFECTIOUS DISEASE CANADA = JOURNAL OFFICIEL DE L'ASSOCIATION POUR LA MICROBIOLOGIE MEDICALE ET L'INFECTIOLOGIE CANADA 2022; 7:196-207. [PMID: 36337596 PMCID: PMC9629734 DOI: 10.3138/jammi-2022-0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 04/05/2022] [Accepted: 04/13/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Bloodstream infections (BSIs) in hospitalized patients represent sentinel events requiring timely and responsive antimicrobial prescribing. These infections represent an attractive but seldom-evaluated stewardship opportunity. METHODS Retrospective pre-post study design, with review of patient charts 18 months before and after initiation of a hospital Bloodstream Infection Stewardship Program (BSISP). Pre-intervention, the ward and attending physician were notified of all positive blood cultures. Post-intervention, an infectious disease (ID) pharmacist collaborating with an ID consultant was also notified. RESULTS Two hundred twenty-six eligible BSIs were identified pre-intervention and 195 post-intervention. The urinary tract was the most common source of infection; most common bloodstream isolates were Escherichia coli, Staphylococcus aureus, beta-hemolytic streptococci, and Klebsiella pneumoniae; 71.7% of infections were community acquired. Empiric therapy was not given in 17.3% of cases and inadequate in 16.4% of patients. Therapy was altered on the basis of Gram stain results ('directed therapy') in 54.6% of episodes and was inadequate in 3.5%. Compared to pre-intervention, the post-intervention cohort received directed therapy on average 4.36 hours earlier (p = 0.003), was more likely to receive appropriate definitive therapy (99.0% post versus 79.1% pre, p <0.001), stepped down to oral therapy earlier (6.0 versus 8.0 days, p = 0.031), and received fewer directed prescriptions (214 per 100 cases post versus 260 per 100 cases pre; p = 0.001), including fewer prescriptions of quinolones and clindamycin. CONCLUSIONS A BSISP could be an effective strategy for improving antimicrobial prescribing in hospitalized patients with a BSI.
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Affiliation(s)
- Gordon Dow
- Division of Infectious Diseases, The Moncton Hospital, Horizon Health Network, Moncton, New Brunswick, Canada
| | - Timothy MacLaggan
- Division of Infectious Diseases, The Moncton Hospital, Horizon Health Network, Moncton, New Brunswick, Canada
| | - Jacques Allard
- Division of Infectious Diseases, The Moncton Hospital, Horizon Health Network, Moncton, New Brunswick, Canada
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12
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Hindy JR, Quintero-Martinez JA, Lee AT, Scott CG, Gerberi DJ, Mahmood M, DeSimone DC, Baddour LM. Incidence Trends and Epidemiology of Staphylococcus aureus Bacteremia: A Systematic Review of Population-Based Studies. Cureus 2022; 14:e25460. [PMID: 35774691 PMCID: PMC9239286 DOI: 10.7759/cureus.25460] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2022] [Indexed: 11/06/2022] Open
Abstract
Objectives: To determine incidence trends of Staphylococcus aureus bacteremia (SAB) from population-based studies from multiple countries. Methods: A contemporary systematic review was conducted using Ovid Cochrane Central Register of Controlled Trials (1991+), Ovid Embase (1974+), Ovid Medical Literature Analysis and Retrieval System Online (MEDLINE) (1946+ including epub ahead of print, in-process & other non-indexed citations), and Web of Science Core Collection (Science Citation Index Expanded 1975+ and Emerging Sources Citation Index 2015+). Two authors (J.R.H. and J.A.Q.M.) independently reviewed all studies and included those that reported population-based incidence of SAB in patients aged 18 years and older. Results: Twenty-six studies met inclusion criteria with the highest number (n=6) of studies conducted in Canada. The incidence of SAB ranged from 9.3 to 65 cases/100,000/year. The median age of patients with SAB ranged from 62 to 72 years and SAB cases were more commonly observed in men than in women. The most common infection sources were intravascular catheters and skin and soft tissue infections. SAB incidence trends demonstrated high variability for geographic regions and calendar years. Overall, there was no change in the incidence trend across all studies during the past two decades. Conclusion: Multiple factors, both pros, and cons are likely responsible for the overall stable SAB incidence in countries included in this systematic review. Some of these factors vary in geographic location and prompt additional investigations from countries not included in the current review so that a more global characterization is defined.
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13
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Martínez Pérez-Crespo PM, Rojas Á, Lanz-García JF, Retamar-Gentil P, Reguera-Iglesias JM, Lima-Rodríguez O, del Arco Jiménez A, Fernández Suárez J, Jover-Saenz A, Goikoetxea Aguirre J, León Jiménez E, Cantón-Bulnes ML, Ortega Lafont P, Armiñanzas Castillo C, Sevilla Blanco J, Cuquet Pedragosa J, Boix-Palop L, Becerril Carral B, Bahamonde-Carrasco A, Marrodan Ciordia T, Natera Kindelán C, Reche Molina IM, Herrero Rodríguez C, Pérez Camacho I, Vinuesa García D, Galán-Sánchez F, Smithson Amat A, Merino de Lucas E, Sánchez-Porto A, Guzmán García M, López-Hernández I, Rodríguez-Baño J, López-Cortés LE. Pseudomonas aeruginosa Community-Onset Bloodstream Infections: Characterization, Diagnostic Predictors, and Predictive Score Development-Results from the PRO-BAC Cohort. Antibiotics (Basel) 2022; 11:antibiotics11060707. [PMID: 35740114 PMCID: PMC9220177 DOI: 10.3390/antibiotics11060707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/15/2022] [Accepted: 05/19/2022] [Indexed: 02/05/2023] Open
Abstract
Community-onset bloodstream infections (CO-BSI) caused by gram-negative bacilli are common and associated with significant mortality; those caused by Pseudomonas aeruginosa are associated with worse prognosis and higher rates of inadequateempirical antibiotic treatment. The aims of this study were to describe the characteristics of patients with CO-BSI caused by P. aeruginosa, to identify predictors, and to develop a predictive score for P. aeruginosa CO-BSI. Materials/methods: PROBAC is a prospective cohort including patients >14 years with BSI from 26 Spanish hospitals between October 2016 and May 2017. Patients with monomicrobial P. aeruginosa CO-BSI and monomicrobial Enterobacterales CO-BSI were included. Variables of interest were collected. Independent predictors of Pseudomonas aeruginosa CO-BSI were identified by logistic regression and a prediction score was developed. Results: A total of 78patients with P. aeruginosa CO-BSI and 2572 with Enterobacterales CO-BSI were included. Patients with P. aeruginosa had a median age of 70 years (IQR 60−79), 68.8% were male, median Charlson score was 5 (IQR 3−7), and 30-daymortality was 18.5%. Multivariate analysis identified the following predictors of CO-BSI-PA [adjusted OR (95% CI)]: male gender [1.89 (1.14−3.12)], haematological malignancy [2.45 (1.20−4.99)], obstructive uropathy [2.86 (1.13−3.02)], source of infection other than urinary tract, biliary tract or intra-abdominal [6.69 (4.10−10.92)] and healthcare-associated BSI [1.85 (1.13−3.02)]. Anindex predictive of CO-BSI-PA was developed; scores ≥ 3.5 showed a negative predictive value of 89% and an area under the receiver operator curve (ROC) of 0.66. Conclusions: We did not find a good predictive score of P. aeruginosa CO-BSI due to its relatively low incidence in the overall population. Our model includes variables that are easy to collect in real clinical practice and could be useful to detect patients with very low risk of P. aeruginosa CO-BSI.
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Affiliation(s)
- Pedro María Martínez Pérez-Crespo
- Infectious Diseases and Microbiology Unit, Hospital Universitario Virgen Macarena and Department of Medicine, University of Sevilla/Biomedicines Institute of Sevilla, 41009 Sevilla, Spain; (P.M.M.P.-C.); (J.F.L.-G.); (P.R.-G.); (I.L.-H.); (L.E.L.-C.)
- Unidad de Enfermedades Infecciosas y Microbiología, Hospital Universitario Nuestra Señora de Valme, 41014 Sevilla, Spain;
| | - Álvaro Rojas
- Departamento de Enfermedades Infecciosas del Adulto, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago 8331150, Chile;
| | - Joaquín Felipe Lanz-García
- Infectious Diseases and Microbiology Unit, Hospital Universitario Virgen Macarena and Department of Medicine, University of Sevilla/Biomedicines Institute of Sevilla, 41009 Sevilla, Spain; (P.M.M.P.-C.); (J.F.L.-G.); (P.R.-G.); (I.L.-H.); (L.E.L.-C.)
| | - Pilar Retamar-Gentil
- Infectious Diseases and Microbiology Unit, Hospital Universitario Virgen Macarena and Department of Medicine, University of Sevilla/Biomedicines Institute of Sevilla, 41009 Sevilla, Spain; (P.M.M.P.-C.); (J.F.L.-G.); (P.R.-G.); (I.L.-H.); (L.E.L.-C.)
| | - José María Reguera-Iglesias
- Servicio de Enfermedades Infecciosas, Hospital Regional Universitario de Málaga, IBIMA Málaga, 29010 Málaga, Spain;
| | - Olalla Lima-Rodríguez
- Unidad de Enfermedades Infecciosas, Servicio de Medicina Interna, Hospital Álvaro Cunqueiro, 36312 Vigo, Spain;
| | - Alfonso del Arco Jiménez
- Grupo Enfermedades Infecciosas, Servicio de Medicina Interna, Hospital Costa del Sol, 29603 Marbella, Spain;
| | - Jonathan Fernández Suárez
- Unidad de Microbiología, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Hospital Universitario Central de Asturias, 33011 Oviedo, Spain;
| | - Alfredo Jover-Saenz
- Unidad Funcional de Infecciones Nosocomiales, Hospital Arnau de Vilanova, 25198 Lérida, Spain;
| | | | - Eva León Jiménez
- Unidad de Enfermedades Infecciosas y Microbiología, Hospital Universitario Nuestra Señora de Valme, 41014 Sevilla, Spain;
| | | | - Pilar Ortega Lafont
- Unidad de Gestión Clínica de Enfermedades Infecciosas, Hospital Universitario de Burgos, 09006 Burgos, Spain;
| | - Carlos Armiñanzas Castillo
- Unidad de Enfermedades Infecciosas, Hospital Universitario Marqués de Valdecilla, Universidad de Cantabria, IDIVAL, 39008 Santander, Spain;
| | - Juan Sevilla Blanco
- Unidad de Gestión Clínica de Enfermedades Infecciosas y Microbiología, Hospital Universitario Jerez de la Frontera, 11407 Jerez de la Frontera, Spain;
| | - Jordi Cuquet Pedragosa
- Departamento de Medicina Interna, Hospital Universitario de Granollers, 08402 Granollers, Spain;
| | - Lucía Boix-Palop
- Unidad de Enfermedades Infecciosas, Hospital Universitari Mútua de Terrassa, 08221 Barcelona, Spain;
| | - Berta Becerril Carral
- Unidad Clínica de Gestión de Enfermedades Infecciosas y Microbiología, Área Sanitaria del Campo de Gibraltar, 11207 Cádiz, Spain;
| | | | - Teresa Marrodan Ciordia
- Departamento de Microbiología Clínica, Complejo Asistencial Universitario de León (CAULE), 24071 León, Spain;
| | - Clara Natera Kindelán
- Unidad Clínica de Enfermedades Infecciosas, Hospital Universitario Reina Sofía, 14004 Córdoba, Spain;
| | | | - Carmen Herrero Rodríguez
- Unidad de Gestión Clínica de Enfermedades Infecciosas y Microbiología Clínica, Complejo Hospitalario de Jaén, 23007 Jaén, Spain;
| | - Inés Pérez Camacho
- Unidad de Medicina Tropical, Hospital General de Poniente, 04700 El Ejido, Spain;
| | - David Vinuesa García
- Unidad Gestión Clínica Enfermedades Infecciosas, Hospital Universitario Clínico San Cecilio, 18016 Granada, Spain;
| | - Fátima Galán-Sánchez
- Unidad de Gestión Clínica de Microbiología, Hospital Universitario Puerta del Mar, 11009 Cádiz, Spain;
| | - Alejandro Smithson Amat
- Unidad de Medicina Interna, Fundació Hospital de l’Esperit Sant, 08923 Santa Coloma de Gramenet, Spain;
| | - Esperanza Merino de Lucas
- Unidad de Enfermedades Infecciosas, Hospital Universitario General de Alicante, 03010 Alicante, Spain;
| | - Antonio Sánchez-Porto
- Unidad de Enfermedades Infecciosas y Microbiología, Hospital de la Línea de la Concepción, 11300 La Línea de la Concepción, Spain;
| | | | - Inmaculada López-Hernández
- Infectious Diseases and Microbiology Unit, Hospital Universitario Virgen Macarena and Department of Medicine, University of Sevilla/Biomedicines Institute of Sevilla, 41009 Sevilla, Spain; (P.M.M.P.-C.); (J.F.L.-G.); (P.R.-G.); (I.L.-H.); (L.E.L.-C.)
| | - Jesús Rodríguez-Baño
- Infectious Diseases and Microbiology Unit, Hospital Universitario Virgen Macarena and Department of Medicine, University of Sevilla/Biomedicines Institute of Sevilla, 41009 Sevilla, Spain; (P.M.M.P.-C.); (J.F.L.-G.); (P.R.-G.); (I.L.-H.); (L.E.L.-C.)
- Correspondence: ; Tel.: +34-660-839-073; Fax: +34-955-926-552
| | - Luis Eduardo López-Cortés
- Infectious Diseases and Microbiology Unit, Hospital Universitario Virgen Macarena and Department of Medicine, University of Sevilla/Biomedicines Institute of Sevilla, 41009 Sevilla, Spain; (P.M.M.P.-C.); (J.F.L.-G.); (P.R.-G.); (I.L.-H.); (L.E.L.-C.)
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Mellhammar L, Elén S, Ehrhard S, Bouma H, Ninck L, Muntjewerff E, Wünsch D, Bloos F, Malmström E, Linder A. New, Useful Criteria for Assessing the Evidence of Infection in Sepsis Research. Crit Care Explor 2022; 4:e0697. [PMID: 35620771 PMCID: PMC9116943 DOI: 10.1097/cce.0000000000000697] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVES The Sepsis-3 definition states the clinical criteria for sepsis but lacks clear definitions of the underlying infection. To address the lack of applicable definitions of infection for sepsis research, we propose new criteria, termed the Linder-Mellhammar criteria of infection (LMCI). The aim of this study was to validate these new infection criteria. DESIGN A multicenter cohort study of patients with suspected infection who were admitted to emergency departments or ICUs. Data were collected from medical records and from study investigators. SETTING Four academic hospitals in Sweden, Switzerland, the Netherlands, and Germany. PATIENTS A total of 934 adult patients with suspected infection or suspected sepsis. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Agreement of infection site classification was measured using the LMCI with Cohen κ coefficient, compared with the Calandra and Cohen definitions of infection and diagnosis on hospital discharge as references. In one of the cohorts, comparisons were also made to adjudications by an expert panel. A subset of patients was assessed for interobserver agreement. MEASUREMENTS AND MAIN RESULTS The precision of the LMCI varied according to the applied reference. LMCI performed better than the Calandra and Cohen definitions (κ = 0.62 [95% CI, 0.59-0.65] vs κ = 0.43 [95% CI, 0.39-0.47], respectively) and the diagnosis on hospital discharge (κ = 0.57 [95% CI, 0.53-0.61] vs κ = 0.43 [95% CI, 0.39-0.47], respectively). The interobserver agreement for the LMCI was evaluated in 91 patients, with agreement in 77%, κ = 0.72 (95% CI, 0.60-0.85). When tested with adjudication as the gold standard, the LMCI still outperformed the Calandra and Cohen definitions (κ = 0.65 [95% CI, 0.60-0.70] vs κ = 0.29 [95% CI, 0.24-0.33], respectively). CONCLUSIONS The LMCI is useful criterion of infection that is intended for sepsis research, in and outside of the ICU. Useful criteria for infection have the potential to facilitate more comparable sepsis research and exclude sepsis mimics from clinical studies, thus improving and simplifying sepsis research.
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Affiliation(s)
- Lisa Mellhammar
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
| | - Sixten Elén
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
| | - Simone Ehrhard
- Department of Emergency Medicine, Inselpital, University Hospital University of Bern, Bern, Bern, Switzerland
| | - Hjalmar Bouma
- Department of Internal Medicine, University Medical Center Groningen, Groningen, The Netherlands
- Department of Clinical Pharmacy & Pharmacology, University Medical Center Groningen, Groningen, The Netherlands
| | - Lorenz Ninck
- Department of Emergency Medicine, Inselpital, University Hospital University of Bern, Bern, Bern, Switzerland
| | - Eva Muntjewerff
- Department of Internal Medicine, University Medical Center Groningen, Groningen, The Netherlands
| | - Daniel Wünsch
- Department of Anesthesiology and Intensive Care Therapy, University Hospital, Jena, Germany
| | - Frank Bloos
- Department of Anesthesiology and Intensive Care Therapy, University Hospital, Jena, Germany
| | - Erik Malmström
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
- Emergency Medicine, Department of Clinical Sciences Lund, Lund University, Skane University Hospital, Lund, Sweden
| | - Adam Linder
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
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15
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Jauneikaite E, Honeyford K, Blandy O, Mosavie M, Pearson M, Ramzan FA, Ellington MJ, Parkhill J, Costelloe CE, Woodford N, Sriskandan S. Bacterial genotypic and patient risk factors for adverse outcomes in Escherichia coli bloodstream infections: a prospective molecular epidemiological study. J Antimicrob Chemother 2022; 77:1753-1761. [PMID: 35265995 PMCID: PMC9155631 DOI: 10.1093/jac/dkac071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 02/07/2022] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Escherichia coli bloodstream infections have shown a sustained increase in England, for reasons that are unknown. Furthermore, the contribution of MDR lineages such as ST131 to overall E. coli disease burden and outcome is undetermined. METHODS We genome-sequenced E. coli blood isolates from all patients with E. coli bacteraemia in north-west London from July 2015 to August 2016 and assigned MLST genotypes, virulence factors and AMR genes to all isolates. Isolate STs were then linked to phenotypic antimicrobial susceptibility, patient demographics and clinical outcome data to explore relationships between the E. coli STs, patient factors and outcomes. RESULTS A total of 551 E. coli genomes were analysed. Four STs (ST131, 21.2%; ST73, 14.5%; ST69, 9.3%; and ST95, 8.2%) accounted for over half of cases. E. coli genotype ST131-C2 was associated with phenotypic non-susceptibility to quinolones, third-generation cephalosporins, amoxicillin, amoxicillin/clavulanic acid, gentamicin and trimethoprim. Among 300 patients from whom outcome was known, an association between the ST131-C2 lineage and longer length of stay was detected, although multivariable regression modelling did not demonstrate an association between E. coli ST and mortality. Several unexpected associations were identified between gentamicin non-susceptibility, ethnicity, sex and adverse outcomes, requiring further research. CONCLUSIONS Although E. coli ST was associated with defined antimicrobial non-susceptibility patterns and prolonged length of stay, E. coli ST was not associated with increased mortality. ST131 has outcompeted other lineages in north-west London. Where ST131 is prevalent, caution is required when devising empiric regimens for suspected Gram-negative sepsis, in particular the pairing of β-lactam agents with gentamicin.
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Affiliation(s)
- Elita Jauneikaite
- NIHR Health Protection Research Unit for Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, London, UK,Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, London, UK
| | - Kate Honeyford
- NIHR Health Protection Research Unit for Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, London, UK,Global Digital Health Unit, Department of Primary Care and Public Health, School of Public Health, Imperial College London, London, UK
| | - Oliver Blandy
- NIHR Health Protection Research Unit for Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, London, UK
| | - Mia Mosavie
- NIHR Health Protection Research Unit for Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, London, UK
| | - Max Pearson
- NIHR Health Protection Research Unit for Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, London, UK
| | - Farzan A. Ramzan
- NIHR Health Protection Research Unit for Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, London, UK
| | - Matthew J. Ellington
- NIHR Health Protection Research Unit for Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, London, UK,National Infection Service Laboratories, National Infection Service, UK Health Security Agency (formerly Public Health England), UK
| | - Julian Parkhill
- Wellcome Sanger Institute, Hinxton, Cambridge, UK,Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Céire E. Costelloe
- Global Digital Health Unit, Department of Primary Care and Public Health, School of Public Health, Imperial College London, London, UK
| | - Neil Woodford
- NIHR Health Protection Research Unit for Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, London, UK,National Infection Service Laboratories, National Infection Service, UK Health Security Agency (formerly Public Health England), UK
| | - Shiranee Sriskandan
- NIHR Health Protection Research Unit for Healthcare Associated Infections and Antimicrobial Resistance, Department of Infectious Disease, Imperial College London, London, UK,Medical Research Council Centre for Molecular Bacteriology & Infection, Imperial College London, London, UK,Corresponding author. E-mail:
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16
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Prevalence and Mortality Associated with Bloodstream Organisms: a Population-Wide Retrospective Cohort Study. J Clin Microbiol 2022; 60:e0242921. [PMID: 35254101 DOI: 10.1128/jcm.02429-21] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bloodstream infections (BSIs) represent a substantial mortality risk, yet most studies are limited to select pathogens or populations. The aim of this study was to describe the population-wide prevalence of BSIs and examine the associated mortality risk for the responsible microorganisms. We conducted a population-wide retrospective cohort study of BSIs in Ontario in 2017. Blood culture data was collected from almost all microbiology laboratories in Ontario and linked to data sets of patient characteristics. For each organism, we determined the prevalence and crude mortality risk, and using logistic regression models, the adjusted odds of 30-day mortality was calculated relative to patients with negative blood cultures and matched patients without blood culture testing. From 531,065 blood cultures, we identified 22,935 positive BSI episodes in 19,326 patients, for an incidence of 150 per 100,000 population. The most frequently isolated organisms were Escherichia coli, Staphylococcus aureus, coagulase-negative staphylococci, Klebsiella species, and Enterococcus species with 40.2, 22.4, 12.1, 11.1, and 7.1 episodes per 100,000 population respectively. BSI episodes were associated with 17.0% mortality at 30 days. Compared to patients with negative cultures, the adjusted 30-day mortality risk for positive BSIs was 1.47 (95% confidence interval (CI), 1.41 to 1.54) and compared to matched patients without blood culture testing was 2.62 (95% CI, 2.52 to 2.73). Clostridium species were associated with the highest adjusted odds of mortality compared to that of negative cultures (adjusted odds ratio, 5.81; 95% CI, 4.00 to 8.44). Among high incidence pathogens, Staphylococcus aureus had the highest odds ratio of mortality (adjusted odds ratio, 2.14; 95% CI, 1.94 to 2.36). BSIs are associated with increased mortality risk, varying across organisms.
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17
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Li Y, Wu Y, Gao Y, Niu X, Li J, Tang M, Fu C, Qi R, Song B, Chen H, Gao X, Yang Y, Guan X. Machine-learning based prediction of prognostic risk factors in patients with invasive candidiasis infection and bacterial bloodstream infection: a singled centered retrospective study. BMC Infect Dis 2022; 22:150. [PMID: 35152879 PMCID: PMC8841094 DOI: 10.1186/s12879-022-07125-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 02/01/2022] [Indexed: 01/08/2023] Open
Abstract
Background Invasive candidal infection combined with bacterial bloodstream infection is one of the common nosocomial infections that is also the main cause of morbidity and mortality. The incidence of invasive Candidal infection with bacterial bloodstream infection is increasing year by year worldwide, but data on China is still limited. Methods We included 246 hospitalised patients who had invasive candidal infection combined with a bacterial bloodstream infection from January 2013 to January 2018; we collected and analysed the relevant epidemiological information and used machine learning methods to find prognostic factors related to death (training set and test set were randomly allocated at a ratio of 7:3). Results Of the 246 patients with invasive candidal infection complicated with a bacterial bloodstream infection, the median age was 63 years (53.25–74), of which 159 (64.6%) were male, 109 (44.3%) were elderly patients (> 65 years), 238 (96.7%) were hospitalised for more than 10 days, 168 (68.3%) were admitted to ICU during hospitalisation, and most patients had records of multiple admissions within 2 years (167/246, 67.9%). The most common blood index was hypoproteinemia (169/246, 68.7%), and the most common inducement was urinary catheter use (210/246, 85.4%). Moreover, the most frequently infected fungi and bacteria were Candida parapsilosis and Acinetobacter baumannii, respectively. The main predictors of death prognosis by machine learning method are serum creatinine level, age, length of stay, stay in ICU during hospitalisation, serum albumin level, C-Reactive protein (CRP), leukocyte count, neutrophil count, Procalcitonin (PCT), and total bilirubin level. Conclusion Our results showed that the most common candida and bacteria infections were caused by Candida parapsilosis and Acinetobacter baumannii, respectively. The main predictors of death prognosis are serum creatinine level, age, length of stay, stay in ICU during hospitalisation, serum albumin level, CRP, leukocyte count, neutrophil count, PCT and total bilirubin level. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-022-07125-8.
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McHugh JW, Talha KM, Baddour LM, Fischer KM, Crestanello J, Arghami A, DeSimone DC. Bloodstream Infection Following Cardiac Valve Repair: A Population-Based Study. Open Forum Infect Dis 2021; 8:ofab493. [PMID: 34938821 PMCID: PMC8687125 DOI: 10.1093/ofid/ofab493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 09/23/2021] [Indexed: 12/04/2022] Open
Abstract
Background The aim of this study was to determine the incidence, epidemiology, and
associated risk factors of bloodstream infection (BSI) in patients who had
previously undergone cardiac valve repair. Methods A population-based study that included 7 counties in southeastern Minnesota
using the expanded Rochester Epidemiology Project (e-REP) for adults
(≥18 years) who underwent valve repair between 1 January 2010 and 31
December 2018 was conducted. Electronic health records were screened for
development of BSI and infective endocarditis (IE) from the date of valve
repair through 30 July 2020. A 1:4 nested case-control analysis was
performed to determine an association, if any, of male sex, Charlson
comorbidity index (CCI), and county of residence with BSI. Results A total of 335 patients underwent valve repair, of whom 28 (8.3%) developed
an index case of BSI, with 14 episodes occurring within 1 year of surgery.
The median age of patients with BSI was 70 years, and 79% were male. The
crude incidence of BSI was 1671 cases per 100000 person-years and
Escherichia coli was the most common pathogen.
Case-control analysis demonstrated a significant correlation between CCI and
incidence of BSI (P < .001). Only 4 (14.3%)
patients developed IE concurrent with the onset of BSI, and no patients
developed IE subsequent to BSI. Conclusions The crude incidence of BSI following valve repair was higher in our e-REP
cohort than previous population-based studies, and half of the BSI cases
occurred within 1 year of surgery. Patients with a higher CCI at baseline
were at increased risk of subsequent BSI.
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Affiliation(s)
- Jack W McHugh
- Department of Internal Medicine, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA
| | - Khawaja M Talha
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA
| | - Larry M Baddour
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA.,Department of Cardiovascular Disease, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA
| | - Karen M Fischer
- Department of Biomedical Statistics and Informatics, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA
| | - Juan Crestanello
- Division of Cardiovascular Surgery, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA
| | - Arman Arghami
- Division of Cardiovascular Surgery, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA
| | - Daniel C DeSimone
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA.,Department of Cardiovascular Disease, Mayo Clinic School of Medicine and Science, Rochester, Minnesota, USA
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Abstract
The causative agents of recurrent Escherichia coli bacteremia can be genetically identical or discordant, but the differences between them remain unclear. This study aimed to explore these differences, with regard to their clinical and microbiological features. Patients were recruited from a Japanese tertiary teaching hospital based on blood culture data and the incidence of recurrent E. coli bacteremia. We compared the patients' clinical and microbiological characteristics between the two groups (those with identical or discordant E. coli bacteremia) divided by the result of enterobacterial repetitive intergenic consensus PCR. Among 70 pairs of recurrent E. coli bacteremia strains, 49 pairs (70%) were genetically identical. Patients with genetically identical or discordant E. coli bacteremia were more likely to have renal failure or neoplasms, respectively. The virulence factor (VF) scores of genetically identical E. coli strains were significantly higher than those of genetically discordant strains, with the prevalence of eight VF genes being significantly higher in genetically identical E. coli strains. No significant differences were found between the two groups regarding antimicrobial susceptibility and biofilm formation potential. This study showed that genetically identical E. coli bacteremia strains have more VF genes than genetically discordant strains in recurrent E. coli bacteremia. IMPORTANCEEscherichia coli causes bloodstream infection, although not all strains are pathogenic to humans. In some cases, this infection reoccurs, and several reports have described the clinical characteristics and/or molecular microbiology of recurrent Escherichia coli bacteremia. However, these studies focused on patients with specific characteristics, and they included cases caused by microorganisms other than Escherichia coli. Hence, little is known about the pathogenicity of Escherichia coli isolated from the recurrent one. The significance of our study is in evaluating the largest cohorts to date, as no cohort studies have been conducted on this topic.
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20
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Church D, Somayaji R, Viczko J, Gregson D, Naugler C. A longitudinal population-based study of predictors of mortality from bloodstream infections in Calgary, Alberta, Canada. Future Microbiol 2021; 17:17-25. [PMID: 34874184 DOI: 10.2217/fmb-2021-0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: To study the predictors of mortality from nine major pathogens causing approximately 70% of cases over a 7-year period. Materials & methods: A population-based surveillance cohort of all adult and pediatric patients in the Calgary Zone with an initial episode of bloodstream infections (BSI). Results: The 1-year mortality was 29.2% among 9524 patients (5164 males [54%]). Incidence rates for BSI increased annually to 119.7/100,000 persons by 2016. Distinct survival curves were found for each specific pathogen. Age, comorbidity burden and infecting organism were significantly associated with increased hazard of death. No relationship occurred between the time to positivity for blood cultures and overall mortality. Conclusion: BSI has a high mortality, but overall survival depends on underlying host health and the type of pathogen acquired.
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Affiliation(s)
- Deirdre Church
- Department of Pathology & Laboratory Medicine, Calgary, AB T2N 4N1, Canada.,Department of Medicine, Cumming School of Medicine, Calgary, AB T2N 4N1, Canada.,Department of the Clinical Section of Microbiology, Calgary Laboratory Services, Calgary, AB T2N 4N1, Canada
| | - Ranjani Somayaji
- Department of Medicine, Cumming School of Medicine, Calgary, AB T2N 4N1, Canada.,Department of Microbiology, Immunology & Infectious Disease, Calgary, AB T2N 4N1, Canada.,Department of Community Health Sciences, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Jeannine Viczko
- Department of Pathology & Laboratory Medicine, Calgary, AB T2N 4N1, Canada.,Department of the Clinical Section of Microbiology, Calgary Laboratory Services, Calgary, AB T2N 4N1, Canada
| | - Dan Gregson
- Department of Pathology & Laboratory Medicine, Calgary, AB T2N 4N1, Canada.,Department of Medicine, Cumming School of Medicine, Calgary, AB T2N 4N1, Canada.,Department of the Clinical Section of Microbiology, Calgary Laboratory Services, Calgary, AB T2N 4N1, Canada
| | - Christopher Naugler
- Department of Pathology & Laboratory Medicine, Calgary, AB T2N 4N1, Canada.,Department of Community Health Sciences, University of Calgary, Calgary, AB T2N 4N1, Canada
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21
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Gerver SM, Nsonwu O, Thelwall S, Brown CS, Hope R. Trends in rates of incidence, fatality and antimicrobial resistance among isolates of Pseudomonas spp. causing bloodstream infections in England between 2009 and 2018. Results from a national voluntary surveillance scheme. J Hosp Infect 2021; 120:73-80. [PMID: 34813873 DOI: 10.1016/j.jhin.2021.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/15/2021] [Accepted: 11/15/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND This article provides baseline epidemiological data on Pseudomonas spp. BSI in England for comparison against future findings from the mandatory surveillance of this infection, beginning April 2017. AIM We report trends in incidence, thirty-day all-cause mortality and antimicrobial resistance of Pseudomonas spp. BSI in England between 2009 and 2018. METHODS Patients and antibiotic susceptibility data were obtained from Public Health England's voluntary surveillance database. Mortality information was linked from a central data repository. FINDINGS There were 39,322 Pseudomonas spp. BSI between 2009 and 2018. Regression analysis found that the incidence rate was greater by 18.5% (p< 0.01) in the summer (June to August) and by 16.2% (p< 0.01) in the autumn (September to November), compared with spring (March to May). The thirty-day all-cause case fatality rate (CFR) declined from 32.0% in 2009 to 23.8% in 2018 (p<0.001). In 2018, resistance to the key antibiotic agents were; ciprofloxacin (7.5%), ceftazidime (6.8%), piperacillin/tazobactam (6.6%), carbapenems (5.5%) and gentamicin (4.1%). The mortality rate per 100,000 population was greater by 25.7% (p< 0.01) in autumn and 23.6% (p< 0.01) in w. inter (December to February). CONCLUSION Despite an overall increase in the number of cases in recent years, the percentage of patients dying (from all causes) after a Pseudomonas spp. BSI has been declining. However, compared with other prominent healthcare-associated BSI, the CFRs are high, and it underscores the need for continued surveillance to support targeted infection control and prevention strategies, provide further understanding of patients' risks groups, and perhaps inform antimicrobial practices.
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Affiliation(s)
- Sarah M Gerver
- Healthcare Associated Infections and Antimicrobial Resistance Division, Public Health England. London
| | - Olisaeloka Nsonwu
- Healthcare Associated Infections and Antimicrobial Resistance Division, Public Health England. London.
| | - Simon Thelwall
- Healthcare Associated Infections and Antimicrobial Resistance Division, Public Health England. London
| | - Colin S Brown
- Healthcare Associated Infections and Antimicrobial Resistance Division, Public Health England. London
| | - Russell Hope
- Healthcare Associated Infections and Antimicrobial Resistance Division, Public Health England. London
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22
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Elseady NSM, Khamis NAGA, AbdelGhani S, Rabea HM, Elanany MG, Nashat Alsheshtawi K, Abdelrahim MEA. Antibiotic sensitivity/resistance pattern of hospital acquired blood stream infection in children cancer patients: A retrospective study. Int J Clin Pract 2021; 75:e14617. [PMID: 34235824 DOI: 10.1111/ijcp.14617] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 07/01/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND The literature shows a growing emphasis on understanding the local patterns of antimicrobial resistance (AMR). We aimed to evaluate the spectrum of local microorganisms that cause bloodstream infections (BSI) and their AMR patterns in an Egyptian institution treating children with cancer. METHODS We conducted a single-centre, retrospective, study on children with confirmed primary, hospital-acquired, BSIs over one year. The microbiological examination of blood samples was done according to the Clinical and Laboratory Standards Institute. The antibiotic sensitivity test was done using VITEK® 2 system. RESULTS We retrieved the data of 607 children with a median age of 5 (0.25-18) years old. The most encountered diagnosis was acute lymphoblastic leukaemia (40%). Most identified microorganisms were gram-negative bacilli, mainly Escherichia coli (27.8%), followed by Klebsiella pneumoniae (12.2%). Gram-negative bacilli showed high resistance to piperacillin/tazobactam, levofloxacin, and meropenem. The lowest resistance rates for Gram-negative bacilli isolates were noted for colistin and tigecycline. Similarly, the gram-positive cocci showed high resistance to ampicillin/sulbactam, cefoxitin, and clindamycin; and low resistance regarding vancomycin and linezolid. CONCLUSION Resistance proportions (pattern) were similar to those reported in other countries with a higher distribution of E coli and a growing resistance to levofloxacin. Further investigation of the predisposing factors and the development of more effective strategies for the prevention of BSI should be a significant public health priority.
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Affiliation(s)
| | | | - Sameh AbdelGhani
- Department of Microbiology and Immunology, Beni-Suef University, Beni-Suef, Egypt
- Department of Medicine, University of Louisville, Louisville, KY, USA
| | | | - Mervat Gaber Elanany
- Clinical Pathology Department Faculty of Medicine, Cairo University, Microbiology Unit 57357 - Children Cancer Hospital, Cairo, Egypt
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23
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Kontula KSK, Skogberg K, Ollgren J, Järvinen A, Lyytikäinen O. Population-Based Study of Bloodstream Infection Incidence and Mortality Rates, Finland, 2004-2018. Emerg Infect Dis 2021; 27. [PMID: 34546161 PMCID: PMC8462341 DOI: 10.3201/eid2710.204826] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A 2-fold increase in incidence and death during this period emphasizes the need for additional prevention efforts. We evaluated the incidence, outcomes, and causative agents of bloodstream infections (BSI) in Finland during 2004–2018 by using data from the national registries. We identified a total of 173,715 BSIs; annual incidence increased from 150 to 309 cases/100,000 population. BSI incidence rose most sharply among persons >80 years of age. The 1-month case-fatality rate decreased from 13.0% to 12.6%, but the 1-month all-cause mortality rate rose from 20 to 39 deaths/100,000 population. BSIs caused by Escherichia coli increased from 26% to 30% of all BSIs. BSIs caused by multidrug-resistant microbes rose from 0.4% to 2.8%, mostly caused by extended-spectrum β-lactamase-producing E. coli. We observed an increase in community-acquired BSIs, from 67% to 78%. The proportion of patients with severe underlying conditions rose from 14% to 23%. Additional public health and healthcare prevention efforts are needed to curb the increasing trend in community-acquired BSIs and antimicrobial drug–resistant E. coli.
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24
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Tsuzuki S, Yu J, Matsunaga N, Ohmagari N. Length of stay, hospitalisation costs and in-hospital mortality of methicillin-susceptible and methicillin-resistant Staphylococcus aureus bacteremia in Japan. Public Health 2021; 198:292-296. [PMID: 34507134 DOI: 10.1016/j.puhe.2021.07.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/29/2021] [Accepted: 07/30/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES To examine the length of stay, hospitalisation costs and case fatality of methicillin-susceptible and -resistant Staphylococcus aureus (MSSA and MRSA) bacteremia in Japan. STUDY DESIGN Retrospective cohort study. Patients with a diagnosis of S. aureus bacteremia who were admitted to a tertiary care hospital (the National Centre for Global Health and Medicine [NCGM]) in Tokyo, Japan, between 1st January 2016 and 31st December 2020 were included in the study. METHODS We combined Japan Nosocomial Infections Surveillance data and Diagnosis Procedure Combination data at NCGM from 2016 to 2020. The data were stratified into MSSA and MRSA groups. Length of stay (LoS), LoS after submission of a blood culture specimen (LoS-after), hospitalisation cost, hospitalisation costs per day and clinical outcome were compared after propensity score matching. RESULTS Median LoS was 46 (interquartile range [IQR] 28.5-64.5) days in the MSSA group and 66 (IQR 40-91) days in the MRSA group (P = 0.020). Median LoS-after was 38 (IQR 25-62.5) days and 45 (IQR 24-63) days (P = 0.691) in the MSSA and MRSA groups, respectively. Median hospitalisation cost was significantly higher in the MRSA group (26,035 [IQR 18,154-47,362] USD) than in the MSSA group (19,823 [IQR 13,764-32,042] USD) (P = 0.036), but cost per day was not (MRSA: 528.9 [IQR 374.9-647.4] USD; MSSA: 455.6 [IQR 359.2-701.7] USD; P = 0.990). Case fatality rate was higher in the MRSA group than in the MSSA group (22/60 vs 9/60, P = 0.012). CONCLUSIONS Patients with MRSA bacteremia had longer LoS and higher costs than those with MSSA bacteremia. However, LoS-after and hospitalisation costs per day were not different. The longer LoS of patients in Japan compared with other countries might contribute to the higher disease burden of S. aureus bacteremia in Japan.
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Affiliation(s)
- S Tsuzuki
- AMR Clinical Reference Center, National Center for Global Health and Medicine, Tokyo, Japan; Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.
| | - J Yu
- AMR Clinical Reference Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - N Matsunaga
- AMR Clinical Reference Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - N Ohmagari
- AMR Clinical Reference Center, National Center for Global Health and Medicine, Tokyo, Japan; Disease Control and Prevention Center, National Center for Global Health and Medicine, Tokyo, Japan
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25
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Birru M, Woldemariam M, Manilal A, Aklilu A, Tsalla T, Mitiku A, Gezmu T. Bacterial profile, antimicrobial susceptibility patterns, and associated factors among bloodstream infection suspected patients attending Arba Minch General Hospital, Ethiopia. Sci Rep 2021; 11:15882. [PMID: 34354138 PMCID: PMC8342484 DOI: 10.1038/s41598-021-95314-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 07/23/2021] [Indexed: 12/13/2022] Open
Abstract
Bacterial bloodstream infections are of great concern globally. Of late, the emergence of drug resistant bacteria worsen the related morbidity and mortality. This study was aimed to determine the bacterial profile, antimicrobial susceptibility patterns, and associated factors among the blood stream infection (BSI) suspected patients attending the Arba Minch General Hospital (AMGH), southern Ethiopia, from 01 June through 31st August, 2020. A cross-sectional study was conducted among 225 BSI suspected patients. Systematic random sampling method was used to select patients. Blood culture was done to isolate bacterial pathogens. Antimicrobial susceptibility test was performed by employing the Kirby-Bauer disc diffusion method. Descriptive statistics and multivariable logistic regression analysis were done by Statistical Package for Social Service (SPSS) version 22. The rate of prevalence of bacteriologically confirmed cases was 22/225 (9.8%). Majority of BSI were caused by Gram-positive cocci, 13/22 (59.1%), particularly the isolates of S. aureus, 7/22 (31.8%) followed by Enterococci species, 4/22 (18.2%) and coagulase-negative Staphylococci (CoNS), 2/22 (9.1%). Among the Gram-negative bacteria 9/22 (41.1%), Klebsiella species 4/22 (18.2%) was the prominent one followed by Escherichia coli 2/22 (9.1%), Pseudomonas aeruginosa 2/22 (9.1%), and Enterobacter species 1/22 (4.5%). All the isolates of Gram-negative bacteria were susceptible to meropenem whereas 69.2% of the isolates of Gram-positive counterparts were susceptible to erythromycin. Slightly above two third (68.2%) of the total isolates were multidrug resistant. Insertion of a peripheral intravenous line was significantly associated with BSI [p = 0.03; Adjusted Odds Ratio = 4.82; (Confidence Interval: 1.08-21.46)]. Overall results revealed that eventhough the prevalence of BSI in Arba Minch is comparatively lower (9.8%), multidrug resistance is alarmingly on the rise, which is to be addressed through effective surveillance and control strategies.
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Affiliation(s)
- Melkam Birru
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, Ethiopia
| | - Melat Woldemariam
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, Ethiopia.
| | - Aseer Manilal
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, Ethiopia.
| | - Addis Aklilu
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, Ethiopia
| | - Tsegaye Tsalla
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, Ethiopia
| | - Asaye Mitiku
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, Ethiopia
| | - Tigist Gezmu
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, Ethiopia
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26
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Biomarker screening and validation for the differentiation of bloodstream infection from adult-onset Still's disease: A prospective cohort study. Cytokine 2021; 146:155642. [PMID: 34325118 DOI: 10.1016/j.cyto.2021.155642] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 07/06/2021] [Accepted: 07/07/2021] [Indexed: 01/02/2023]
Abstract
OBJECTIVES Distinguishing between bloodstream infection (BSI) and adult-onset Still's disease (AOSD) is challenging in practice due to similarities in their clinical and laboratory characteristics. We aimed to identify biomarkers in a prospective cohort of patients with BSI and AOSD for differential diagnosis and prognosis prediction. METHODS Sixty-four individuals were enrolled in the training set (37 with BSI, 17 with AOSD, and 10 healthy controls). Furthermore, 86 individuals were enrolled in the validation cohort (67 with BSI and 19 with AOSD). Clinical and laboratory data were collected. Blood samples were stimulated using bacteria-specific antigens and levels of several cytokines were detected in the supernatant via Luminex or enzyme-linked immunosorbent assay. RESULTS Escherichia coli and Klebsiella pneumoniae were the pathogens most frequently responsible for BSI. In the training cohort, the incidence of rash, arthralgia, myalgia, sore throat, lymphadenopathy, leukocytosis, and hyperferritinemia was higher in patients with AOSD than in those with BSI. Procalcitonin was significantly higher in patients with BSI than that in those with AOSD. Interleukin (IL)-6, IL-17A, C-X3-C motif chemokine ligand (CX3CL)-1, and C-X-C motif chemokine ligand 10 (CXCL10) levels were higher in patients with BSI than in those with AOSD. IL-18 was higher among patients with AOSD than in those with BSI. A decision tree analysis showed that a combination of plasma IL-18 and ferritin levels can be used to distinguish BSI from AOSD (diagnostic accuracy: 97.67%, sensitivity: 96.15%, specificity: 100%). Plasma IL-18 levels were positively correlated with ferritin, and were decreased after treatment in both BSI and ASOD groups. CONCLUSIONS Plasma IL-18 and ferritin levels can be used to differentiate BSI from AOSD. IL-18 may be a potential biomarker for prognosis prediction in BSI and AOSD.
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27
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Abstract
Bloodstream infections (BSI) are a major public health burden due to high mortality rates and the cost of treatment. The impact of BSI is further compounded by a rise in antibiotic resistance among Gram-negative species associated with these infections. Escherichia coli, Serratia marcescens, Klebsiella pneumoniae, Enterobacter hormaechei, Citrobacter freundii, and Acinetobacter baumannii are all common causes of BSI, which can be recapitulated in a murine model. The objective of this study was to characterize infection kinetics and bacterial replication rates during bacteremia for these six pathogens to gain a better understanding of bacterial physiology during infection. Temporal observations of bacterial burdens of the tested species demonstrated varied abilities to establish colonization in the spleen, liver, or kidney. K. pneumoniae and S. marcescens expanded rapidly in the liver and kidney, respectively. Other organisms, such as C. freundii and E. hormaechei, were steadily cleared from all three target organs throughout the infection. In situ replication rates measured by whole-genome sequencing of bacterial DNA recovered from murine spleens demonstrated that each species was capable of sustained replication at 24 h postinfection, and several species demonstrated <60-min generation times. The relatively short generation times observed in the spleen were in contrast to an overall decrease in bacterial burden for some species, suggesting that the rate of immune-mediated clearance exceeded replication. Furthermore, bacterial generation times measured in the murine spleen approximated those measured during growth in human serum cultures. Together, these findings provide insight into the infection kinetics of six medically important species during bacteremia.
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28
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Denny S, Rawson TM, Hart P, Satta G, Abdulaal A, Hughes S, Gilchrist M, Mughal N, Moore LSP. Bacteraemia variation during the COVID-19 pandemic; a multi-centre UK secondary care ecological analysis. BMC Infect Dis 2021; 21:556. [PMID: 34116643 PMCID: PMC8195453 DOI: 10.1186/s12879-021-06159-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 05/10/2021] [Indexed: 11/29/2022] Open
Abstract
Background We investigated for change in blood stream infections (BSI) with Enterobacterales, coagulase negative staphylococci (CoNS), Streptococcus pneumoniae, and Staphylococcus aureus during the first UK wave of SARS-CoV-2 across five London hospitals. Methods A retrospective multicentre ecological analysis was undertaken evaluating all blood cultures taken from adults from 01 April 2017 to 30 April 2020 across five acute hospitals in London. Linear trend analysis and ARIMA models allowing for seasonality were used to look for significant variation. Results One hundred nineteen thousand five hundred eighty-four blood cultures were included. At the height of the UK SARS-CoV-2 first wave in April 2020, Enterobacterales bacteraemias were at an historic low across two London trusts (63/3814, 1.65%), whilst all CoNS BSI were at an historic high (173/3814, 4.25%). This differed significantly for both Enterobacterales (p = 0.013), CoNS central line associated BSIs (CLABSI) (p < 0.01) and CoNS non-CLABSI (p < 0.01), when compared with prior periods, even allowing for seasonal variation. S. pneumoniae (p = 0.631) and S. aureus (p = 0.617) BSI did not vary significant throughout the study period. Conclusions Significantly fewer than expected Enterobacterales BSI occurred during the UK peak of the COVID-19 pandemic; identifying potential causes, including potential unintended consequences of national self-isolation public health messaging, is essential. High rates of CoNS BSI, with evidence of increased CLABSI, but also likely contamination associated with increased use of personal protective equipment, may result in inappropriate antimicrobial use and indicates a clear area for intervention during further waves. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-021-06159-8.
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Affiliation(s)
- Sarah Denny
- Chelsea and Westminster NHS Foundation Trust, 369 Fulham Road, London, SW10 9NH, UK
| | - Timothy M Rawson
- Imperial College Healthcare NHS Trust, Praed Street, London, W2 1NY, UK.,Department of Infectious Diseases, Imperial College London, Hammersmith Campus, Du Cane Road, London, W12 0NN, UK
| | | | - Giovanni Satta
- Imperial College Healthcare NHS Trust, Praed Street, London, W2 1NY, UK.,North West London Pathology, Fulham Palace Road, London, W6 8RF, UK
| | - Ahmed Abdulaal
- Chelsea and Westminster NHS Foundation Trust, 369 Fulham Road, London, SW10 9NH, UK
| | - Stephen Hughes
- Chelsea and Westminster NHS Foundation Trust, 369 Fulham Road, London, SW10 9NH, UK
| | - Mark Gilchrist
- Imperial College Healthcare NHS Trust, Praed Street, London, W2 1NY, UK
| | - Nabeela Mughal
- Chelsea and Westminster NHS Foundation Trust, 369 Fulham Road, London, SW10 9NH, UK.,Department of Infectious Diseases, Imperial College London, Hammersmith Campus, Du Cane Road, London, W12 0NN, UK.,North West London Pathology, Fulham Palace Road, London, W6 8RF, UK
| | - Luke S P Moore
- Chelsea and Westminster NHS Foundation Trust, 369 Fulham Road, London, SW10 9NH, UK. .,Department of Infectious Diseases, Imperial College London, Hammersmith Campus, Du Cane Road, London, W12 0NN, UK. .,North West London Pathology, Fulham Palace Road, London, W6 8RF, UK.
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29
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Holm MKA, Jansåker F, Gradel KO, Nielsen RT, Østergaard Andersen C, Jarløv JO, Schønheyder HC, Dahl Knudsen J. Decrease in All-Cause 30-Day Mortality after Bacteraemia over a 15-Year Period: A Population-Based Cohort Study in Denmark in 2000-2014. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:5982. [PMID: 34199587 PMCID: PMC8199663 DOI: 10.3390/ijerph18115982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/26/2021] [Accepted: 05/28/2021] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Bacteraemia is a frequent infectious condition that strongly affects morbidity and mortality. The incidence is increasing worldwide. This study explores all-cause 30-day mortality after bacteraemia in two out of Denmark's five healthcare regions with approximately 2.4 million inhabitants. METHODS Clinically significant bacteraemia episodes (n = 55,257) were identified from a geographically well-defined background population between 2000 and 2014, drawing on population-based data regarding bacterial species and vital status. All-cause 30-day mortality was assessed in relation to bacteraemia episodes, number of patients with analysed blood cultures and the background population. RESULTS We observed a decreasing trend of all-cause 30-day mortality between 2000 and 2014, both in relation to the number of bacteraemia episodes and the background population. Mortality decreased from 22.7% of the bacteraemia episodes in 2000 to 17.4% in 2014 (annual IRR [95% CI]: 0.983 [0.979-0.987]). In relation to the background population, there were 41 deaths per 100,000 inhabitants in 2000, decreasing to 39 in 2014 (annual IRR [95% CI]: 0.988 [0.982-0.993]). Numbers of inhabitants, bacteraemia episodes, and analysed persons having BCs increased during the period. CONCLUSIONS All-cause 30-day mortality in patients with bacteraemia decreased significantly over a 15-year period.
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Affiliation(s)
- Mona Katrine Alberthe Holm
- Department of Clinical Microbiology, Copenhagen University Hospital Hvidovre, Kettegaard Alle 30, 2650 Hvidovre, Denmark; (R.T.N.); (C.Ø.A.)
| | - Filip Jansåker
- Department of Clinical Microbiology, Copenhagen University Hospital, Rigshospitalet, 2100 Copenhagen N, Denmark; (F.J.); (J.D.K.)
- Center for Primary Health Care Research, Department of Clinical Sciences Malmö, Lund University, 214 28 Lund, Sweden
| | - Kim Oren Gradel
- Center for Clinical Epidemiology, Odense University Hospital, 5000 Odense, Denmark;
- Research Unit of Clinical Epidemiology, Department of Clinical Research, University of Southern Denmark, 5230 Odense, Denmark
| | - Rikke Thoft Nielsen
- Department of Clinical Microbiology, Copenhagen University Hospital Hvidovre, Kettegaard Alle 30, 2650 Hvidovre, Denmark; (R.T.N.); (C.Ø.A.)
- Department of Infectious Disease Epidemiology and Prevention, Statens Serum Institut, 2300 Copenhagen S, Denmark
| | - Christian Østergaard Andersen
- Department of Clinical Microbiology, Copenhagen University Hospital Hvidovre, Kettegaard Alle 30, 2650 Hvidovre, Denmark; (R.T.N.); (C.Ø.A.)
| | - Jens Otto Jarløv
- Department of Clinical Microbiology, Copenhagen University Hospital, Herlev and Gentofte, 2730 Herlev, Denmark;
| | - Henrik Carl Schønheyder
- Department of Clinical Microbiology, Aalborg University Hospital, 9000 Aalborg, Denmark;
- Department of Medicine, Aalborg University, 9220 Aalborg, Denmark
| | - Jenny Dahl Knudsen
- Department of Clinical Microbiology, Copenhagen University Hospital, Rigshospitalet, 2100 Copenhagen N, Denmark; (F.J.); (J.D.K.)
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Singhal C, Bruno JG, Kaushal A, Sharma TK. Recent Advances and a Roadmap to Aptamer-Based Sensors for Bloodstream Infections. ACS APPLIED BIO MATERIALS 2021; 4:3962-3984. [PMID: 35006817 DOI: 10.1021/acsabm.0c01358] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The present review is intended to describe bloodstream infections (BSIs), the major pathogens responsible for BSIs, conventional tests and their limitations, commercially available methods used, and the aptamer and nanomaterials-based approaches developed so far for the detection of BSIs. The advantages associated with aptamers and the aptamer-based sensors, the comparison between the aptamers and the antibodies, and the various types of aptasensors developed so far for the detection of bloodstream infections have been described in detail in the present review. Also, the future outlook and roadmap toward aptamer-based sensors and the challenges associated with the aptamer development have also been concluded in this review.
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Affiliation(s)
- Chaitali Singhal
- Aptamer Technology and Diagnostic Laboratory, Multidisciplinary Clinical and Translational Research Group, Translational Health Science and Technology Institute (THSTI), Faridabad, Haryana 121001, India
| | - John G Bruno
- Nanohmics, Inc., Austin, Texas 78741, United States
| | - Ankur Kaushal
- Centre of Nanotechnology, Amity University, Manesar, Gurugram, Haryana 122413, India
| | - Tarun K Sharma
- Aptamer Technology and Diagnostic Laboratory, Multidisciplinary Clinical and Translational Research Group, Translational Health Science and Technology Institute (THSTI), Faridabad, Haryana 121001, India
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Tsuzuki S, Matsunaga N, Yahara K, Shibayama K, Sugai M, Ohmagari N. Disease burden of bloodstream infections caused by antimicrobial-resistant bacteria: A population-level study, Japan, 2015-2018. Int J Infect Dis 2021; 108:119-124. [PMID: 33992765 DOI: 10.1016/j.ijid.2021.05.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Antimicrobial resistance (AMR) is a global health problem. However, quantitative evaluation of its disease burden is challenging. This study aimed to estimate the disease burden of bloodstream infections (BSIs) caused by major antimicrobial-resistant bacteria in Japan between 2015 and 2018 in terms of disability-adjusted life-years (DALYs). METHODS DALYs of BSIs caused by nine major antimicrobial-resistant bacteria in Japan were estimated using comprehensive national surveillance data of all routine bacteriological test results from more than 1400 hospitals between 2015 and 2018. The methodology of Cassini et al. was modified to enable comparison of the present results with those in other countries. RESULTS It was estimated that 137.9 [95% uncertainty interval (UI) 130.7-145.2] DALYs per 100,000 population were attributable to BSIs caused by nine antimicrobial-resistant bacteria in 2018. Methicillin-resistant Staphylococcus aureus (MRSA), fluoroquinolone-resistant Escherichia coli (FQREC) and third-generation cephalosporin-resistant E. coli (3GREC) accounted for 87.2% overall. The burden did not decrease during the study period and was highest in people aged ≥65 years. CONCLUSION The results revealed, for the first time, the disease burden of BSIs caused by nine major antimicrobial-resistant bacteria in Japan. The estimated disease burden associated with AMR in Japan is substantial and has not begun to decrease. Notably, the burden from FQREC and 3GREC has increased steadily, and that from MRSA is larger in Japan than in the European Union/European Economic Area, whereas the burden from other bacteria is comparatively small. These results are expected to provide useful information for healthcare policy makers for prioritizing interventions for AMR.
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Affiliation(s)
- Shinya Tsuzuki
- AMR Clinical Reference Centre, National Centre for Global Health and Medicine, Tokyo, Japan; Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium; Disease Control and Prevention Centre, National Centre for Global Health and Medicine, Tokyo, Japan.
| | - Nobuaki Matsunaga
- AMR Clinical Reference Centre, National Centre for Global Health and Medicine, Tokyo, Japan
| | - Koji Yahara
- Antimicrobial Resistance Research Centre, National Institute of Infectious Diseases, Tokyo, Japan
| | - Keigo Shibayama
- Antimicrobial Resistance Research Centre, National Institute of Infectious Diseases, Tokyo, Japan; Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Motoyuki Sugai
- Antimicrobial Resistance Research Centre, National Institute of Infectious Diseases, Tokyo, Japan
| | - Norio Ohmagari
- AMR Clinical Reference Centre, National Centre for Global Health and Medicine, Tokyo, Japan; Disease Control and Prevention Centre, National Centre for Global Health and Medicine, Tokyo, Japan
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Revisiting the epidemiology of bloodstream infections and healthcare-associated episodes: results from a multicentre prospective cohort in Spain (PRO-BAC Study). Int J Antimicrob Agents 2021; 58:106352. [PMID: 33961992 DOI: 10.1016/j.ijantimicag.2021.106352] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 03/02/2021] [Accepted: 04/24/2021] [Indexed: 11/22/2022]
Abstract
The epidemiology of bloodstream infections (BSIs) is dynamic as it depends on microbiological, host and healthcare system factors. The aim of this study was to update the information regarding the epidemiology of BSIs in Spain considering the type of acquisition. An observational, prospective cohort study in 26 Spanish hospitals from October 2016 through March 2017 including all episodes of BSI in adults was performed. Bivariate analyses stratified by type of acquisition were performed. Multivariate analyses were performed by logistic regression. Overall, 6345 BSI episodes were included; 2510 (39.8%) were community-acquired (CA), 1661 (26.3%) were healthcare-associated (HCA) and 2056 (32.6%) hospital-acquired (HA). The 30-day mortality rates were 11.6%, 19.5% and 22.0%, respectively. The median age of patients was 71 years (interquartile range 60-81 years) and 3656 (58.3%; 95% confidence interval 57.1-59.6%) occurred in males. The proportions according to patient sex varied according to age strata. Escherichia coli (43.8%), Klebsiella spp. (8.9%), Staphylococcus aureus (8.9%) and coagulase-negative staphylococci (7.4%) were the most frequent pathogens. Multivariate analyses confirmed important differences between CA and HCA episodes, but also between HCA and HA episodes, in demographics, underlying conditions and aetiology. In conclusion, we have updated the epidemiological information regarding patients' profiles, underlying conditions, frequency of acquisition types and aetiological agents of BSI in Spain. HCA is confirmed as a distinct type of acquisition.
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Epidemiology and Antimicrobial Susceptibility of Invasive Bacterial Infections in Children-A Population-Based Study From Norway. Pediatr Infect Dis J 2021; 40:403-410. [PMID: 33298760 DOI: 10.1097/inf.0000000000003013] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To describe epidemiology and antimicrobial susceptibility testing (AST) data of bacteria causing invasive infections in Norwegian children (0-18 years). METHODS Population-based observational study using prospectively collected AST data from the Norwegian Surveillance System of Antimicrobial Resistance from 2013 to 2017. We included all clinically relevant bacterial isolates (blood and cerebrospinal fluid), and compared incidence of invasive infections and AST data in isolates from children and adults. RESULTS We included 1173 isolates from children and 44,561 isolates from adults. Staphylococcus aureus accounted for 220/477 (46.2%, 95% CI: 41.6-50.7) of all isolates in schoolchildren (6-18 years). Compared with Streptococcus pneumonia isolates from adults (N = 2674), we observed higher nonsusceptibility rates to penicillin in isolates from children (N = 151), 11.9% versus 5.8%, P < 0.01; also higher resistance rates to erythromycin (11.3% vs. 4.9%, P < 0.01), clindamycin (9.3% vs. 3.6%, P < 0.001), and trimethoprim/sulfamethoxazole (17.9% vs. 6.4%, P < 0.001). Compared with Escherichia coli isolates in adults (N = 9073), we found lower rates of ESBL in isolates from children (N = 212), 2.4% versus 6.4%, P < 0.05. CONCLUSION The study indicates the importance of microbiologic surveillance strategies in children and highlights the need for pediatric AST data. The high rates of nonsusceptibility to commonly used antibiotics among S. pneumoniae in children and the high burden of invasive S. aureus infections in schoolchildren calls for modifications of Norwegian guidelines.
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Ueda T, Takesue Y, Matsumoto T, Tateda K, Kusachi S, Mikamo H, Sato J, Hanaki H, Mizuguchi T, Morikane K, Kobayashi M, Harihara Y, Seki S, Ishida Y, Fukushima R, Hada M, Matsuo Y, Kubo S, Kimura Y, Hata H, Nakajima K, Ohge H, Akagi S, Takeda S, Fukui Y, Suzuki K, Okamoto K, Yanagihara K, Kawamura H. Change in antimicrobial susceptibility of pathogens isolated from surgical site infections over the past decade in Japanese nation-wide surveillance study. J Infect Chemother 2021; 27:931-939. [PMID: 33795192 DOI: 10.1016/j.jiac.2021.03.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/01/2021] [Accepted: 03/11/2021] [Indexed: 12/24/2022]
Abstract
Inappropriate antimicrobial therapy for surgical site infections (SSIs) can lead to poor outcomes and an increased risk of antibiotic resistance. A nationwide survey was conducted in Japan from 2018 to 2019 to investigate the antimicrobial susceptibility of pathogens isolated from SSIs. The data were compared with those obtained in 2010 and 2014-2015 surveillance studies. Although the rate of detection of extended-spectrum β-lactamase producing strains of Escherichia coli was increased from 9.5% in 2010 to 23% in 2014-2015, the incidence decreased to 8.7% in 2018-2019. Although high susceptibility rates were detected to piperacillin/tazobactam (TAZ), the geometric mean MICs were substantially higher than to meropenem (2.67 vs 0.08 μg/mL). By contrast, relatively low geometric mean MICs (0.397 μg/mL) were demonstrated for ceftolozane/TAZ. Although the MRSA incidence rate decreased from 72% in the first surveillance to 53% in the second, no further decrease was detected in 2018-2019. For the Bacteroides fragilis group species, low levels of susceptibility were observed for moxifloxacin (65.3%), cefoxitin (65.3%), and clindamycin (CLDM) (38.9%). In particular, low susceptibility against cefoxitin was demonstrated in non-fragilis Bacteroides, especially B. thetaiotaomicron. By contrast, low susceptibility rates against CLDM were demonstrated in both B. fragilis and non-fragilis Bacteroides species, and a steady decrease in susceptibility throughout was observed (59.3% in 2010, 46.9% in 2014-2015, and 38.9% in 2018-2019). In conclusion, Japanese surveillance data revealed no significant lowering of antibiotic susceptibility over the past decade in organisms commonly associated from SSIs, with the exception of the B. fragilis group.
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Affiliation(s)
- Takashi Ueda
- Department of Infection Control and Prevention, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.
| | - Yoshio Takesue
- The Surveillance Committee of Japanese Society of Cemotherapy (JSC), The Japanese Association for Infectious Disease (JAID) and the Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan; Department of Infection Control and Prevention, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Tetsuya Matsumoto
- The Surveillance Committee of Japanese Society of Cemotherapy (JSC), The Japanese Association for Infectious Disease (JAID) and the Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Kazuhiro Tateda
- The Surveillance Committee of Japanese Society of Cemotherapy (JSC), The Japanese Association for Infectious Disease (JAID) and the Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Shinya Kusachi
- The Surveillance Committee of Japanese Society of Cemotherapy (JSC), The Japanese Association for Infectious Disease (JAID) and the Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Hiroshige Mikamo
- The Surveillance Committee of Japanese Society of Cemotherapy (JSC), The Japanese Association for Infectious Disease (JAID) and the Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan; Department of Clinical Infectious Diseases, Aichi Medical University, Aichi, Japan
| | - Junko Sato
- The Surveillance Committee of Japanese Society of Cemotherapy (JSC), The Japanese Association for Infectious Disease (JAID) and the Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Hideaki Hanaki
- Infection Control Research Center, Kitasato University, Tokyo, Japan
| | - Toru Mizuguchi
- Department of Nursing, Surgical Science, Sapporo Medical University, Hokkaido Japan
| | - Keita Morikane
- Division of Clinical Laboratory and Infection Control, Yamagata University Hospital, Yamagata, Japan
| | | | | | - Shiko Seki
- Department of Surgery, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Yuichi Ishida
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Ryoji Fukushima
- Department of Surgery, Teikyo University Hospital, Tokyo, Japan
| | - Masahiro Hada
- Department of Surgery, Kouseiren Takaoka Hospital, Toyama, Japan
| | - Yoichi Matsuo
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Aichi, Japan
| | - Shoji Kubo
- Department of Hepato-Biliary-Pancreatic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yutaka Kimura
- Department of Surgery, Kindai University Hospital, Osaka, Japan
| | - Hiroaki Hata
- Department of Surgery, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
| | - Kazuhiko Nakajima
- Department of Infection Control and Prevention, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Hiroki Ohge
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan
| | - Shinji Akagi
- Department of Surgery, Mazda Hospital, Mazda Motor Corporation, Hiroshima, Japan
| | - Shigeru Takeda
- Department of Gastroenterological, Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Yasuo Fukui
- Department of Surgery, Kochi Health Sciences Center, Kochi, Japan
| | - Katsunori Suzuki
- University of Occupational and Environmental Health Japan, Fukuoka, Japan
| | - Kohji Okamoto
- Department of Surgery, Gastroenterology and Hepatology Center, Kitakyushu City Yahata Hospital, Fukuoka, Japan
| | | | - Hideki Kawamura
- Department of Infection Control and Prevention, Kagoshima University Hospital, Kagoshima, Japan
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Cassotta A, Goldstein JD, Durini G, Jarrossay D, Baggi Menozzi F, Venditti M, Russo A, Falcone M, Lanzavecchia A, Gagliardi MC, Latorre D, Sallusto F. Broadly reactive human CD4 + T cells against Enterobacteriaceae are found in the naïve repertoire and are clonally expanded in the memory repertoire. Eur J Immunol 2021; 51:648-661. [PMID: 33226131 PMCID: PMC7986685 DOI: 10.1002/eji.202048630] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 09/15/2020] [Accepted: 11/19/2020] [Indexed: 12/13/2022]
Abstract
Enterobacteriaceae are a large family of Gram-negative bacteria that includes both commensals and opportunistic pathogens. The latter can cause severe nosocomial infections, with outbreaks of multi-antibiotics resistant strains, thus being a major public health threat. In this study, we report that Enterobacteriaceae-reactive memory Th cells were highly enriched in a CCR6+ CXCR3+ Th1*/17 cell subset and produced IFN-γ, IL-17A, and IL-22. This T cell subset was severely reduced in septic patients with K. pneumoniae bloodstream infection who also selectively lacked circulating K. pneumonie-reactive T cells. By combining heterologous antigenic stimulation, single cell cloning and TCR Vβ sequencing, we demonstrate that a large fraction of memory Th cell clones was broadly cross-reactive to several Enterobacteriaceae species. These cross-reactive Th cell clones were expanded in vivo and a large fraction of them recognized the conserved outer membrane protein A antigen. Interestingly, Enterobacteriaceae broadly cross-reactive T cells were also prominent among in vitro primed naïve T cells. Collectively, these data point to the existence of immunodominant T cell epitopes shared among different Enterobacteriaceae species and targeted by cross-reactive T cells that are readily found in the pre-immune repertoire and are clonally expanded in the memory repertoire.
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Affiliation(s)
- Antonino Cassotta
- Institute for Research in BiomedicineUniversità della Svizzera italianaBellinzonaSwitzerland
- Institute of MicrobiologyETH ZurichSwitzerland
| | - Jérémie D. Goldstein
- Institute for Research in BiomedicineUniversità della Svizzera italianaBellinzonaSwitzerland
| | - Greta Durini
- Institute for Research in BiomedicineUniversità della Svizzera italianaBellinzonaSwitzerland
| | - David Jarrossay
- Institute for Research in BiomedicineUniversità della Svizzera italianaBellinzonaSwitzerland
| | | | - Mario Venditti
- Department of Public Health and Infectious DiseasesSapienza University of RomeRomeItaly
| | - Alessandro Russo
- Department of Clinical and Experimental MedicineUniversity of PisaPisaItaly
| | - Marco Falcone
- Department of Clinical and Experimental MedicineUniversity of PisaPisaItaly
| | - Antonio Lanzavecchia
- Institute for Research in BiomedicineUniversità della Svizzera italianaBellinzonaSwitzerland
| | | | - Daniela Latorre
- Institute for Research in BiomedicineUniversità della Svizzera italianaBellinzonaSwitzerland
- Institute of MicrobiologyETH ZurichSwitzerland
| | - Federica Sallusto
- Institute for Research in BiomedicineUniversità della Svizzera italianaBellinzonaSwitzerland
- Institute of MicrobiologyETH ZurichSwitzerland
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Martínez Pérez-Crespo P, López-Cortés L, Retamar-Gentil P, García JL, Vinuesa García D, León E, Calvo JS, Galán-Sánchez F, Natera Kindelan C, del Arco Jiménez A, Sánchez-Porto A, Herrero Rodríguez C, Becerril Carral B, Molina IR, Iglesias JR, Pérez Camacho I, Guzman García M, López-Hernández I, Rodríguez-Baño J. Epidemiologic changes in bloodstream infections in Andalucía (Spain) during the last decade. Clin Microbiol Infect 2021; 27:283.e9-283.e16. [DOI: 10.1016/j.cmi.2020.05.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 05/06/2020] [Accepted: 05/09/2020] [Indexed: 10/24/2022]
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Antimicrobial Resistance in Enterobacterales Bacilli Isolated from Bloodstream Infection in Surgical Patients of Polish Hospitals. Int J Microbiol 2021; 2021:6687148. [PMID: 33510792 PMCID: PMC7826220 DOI: 10.1155/2021/6687148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 12/12/2020] [Accepted: 01/05/2021] [Indexed: 11/17/2022] Open
Abstract
Background and Aims Bloodstream infections (BSIs) are one of the most frequently observed hospital-acquired infections (HAIs). We sought to describe the epidemiology and drug resistance secondary Enterobacterales BSIs in surgical patients and check for any correlation with the type of hospital ward. Materials and Methods This multicenter (13 hospitals in southern Poland) laboratory-based retrospective study evaluated adults diagnosed with BSI secondary to surgical site infection (SSI) hospitalized in 2015-2018; 121 Enterobacterales strains were collected. The drug resistance was tested according to the EUCAST recommendations. Tests confirming the presence of extended-spectrum β-lactamases (ESBLs) and bla resistance genes were carried out. The occurrence of possible clonal epidemics among K. pneumoniae strains was examined. Results The prevalence of Enterobacterales in secondary BSI was 12.1%; the most common strains were E. coli (n = 74, 61.2%) and Klebsiella spp. (n = 33, 27.2%). High resistance involved ampicillin and ampicillin/sulbactam (92, 8-100%), fluoroquinolones (48-73%), and most cephalosporins (29-50%). Carbapenems were the antimicrobials with the susceptibility at 98%. The prevalence of ESBL strains was 37.2% (n = 45). All the ESBL strains had bla CTX-M gene, 26.7% had the bla SHV gene, and 24.4% had bla TEM gene. The diversity of Klebsiella strains was relatively high. Only 4 strains belonged to one clone. Conclusions What is particularly worrying is the high prevalence of Enterobacterales in BSI, as well as the high resistance to antimicrobial agents often used in the empirical therapy. To improve the effectiveness of empirical treatment in surgical departments, we need to know the epidemiology of both surgical site infection and BSI, secondary to SSI. We were surprised to note high heterogeneity among K. pneumoniae strains, which was different from our previous experience.
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Santoro A, Franceschini E, Meschiari M, Menozzi M, Zona S, Venturelli C, Digaetano M, Rogati C, Guaraldi G, Paul M, Gyssens IC, Mussini C. Epidemiology and Risk Factors Associated With Mortality in Consecutive Patients With Bacterial Bloodstream Infection: Impact of MDR and XDR Bacteria. Open Forum Infect Dis 2020; 7:ofaa461. [PMID: 33209951 PMCID: PMC7652098 DOI: 10.1093/ofid/ofaa461] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/25/2020] [Indexed: 12/31/2022] Open
Abstract
Background Mortality related to bloodstream infections (BSIs) is high. The epidemiology of BSIs is changing due to the increase in multidrug resistance, and it is unclear whether the presence of multidrug-resistant (MDR) organisms, per se, is an independent risk factor for mortality. Our objectives were, first, to describe the epidemiology and outcome of BSIs and, second, to determine the risk factors associated with mortality among patients with BSI. Methods This research used a single-center retrospective observational study design. Patients were identified through microbiological reports. Data on medical history, clinical condition, bacteria, antimicrobial therapy, and mortality were collected. The primary outcome was crude mortality at 30 days. The relationships between mortality and demographic, clinical, and microbiological variables were analyzed by multivariate analysis. Results A total of 1049 inpatients were included. MDR bacteria were isolated in 27.83% of patients, where 2.14% corresponded to an extremely drug-resistant (XDR) isolate. The crude mortality rates at days 7, 30, and 90 were 12.11%, 25.17%, and 36.13%, respectively. Pitt score >2, lung and abdomen as site of infection, and XDR Pseudomonas aeruginosa were independent risk factors for 7-, 30-, and 90-day mortality. Charlson score >4, carbapenem-resistant Klebsiella pneumoniae, and XDR Acinetobacter baumannii were independent risk factors for 30- and 90-day mortality. Infection by XDR gram-negative bacteria, Charlson score >4, and immunosuppression were independent risk factors for mortality in patients who were stable at the time of BSI. Conclusions BSI is an event with an extreme impact on mortality. Patients with severe clinical condition are at higher risk of death. The presence of XDR gram-negative bacteria in blood is strongly and independently associated with patient death.
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Affiliation(s)
- Antonella Santoro
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
| | - Erica Franceschini
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
| | - Marianna Meschiari
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
| | - Marianna Menozzi
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
| | - Stefano Zona
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
| | - Claudia Venturelli
- Department of Microbiology, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
| | - Margherita Digaetano
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
| | - Carlotta Rogati
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
| | - Giovanni Guaraldi
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
| | - Mical Paul
- Rambam Medical Center, Infectious Diseases Department, Haifa, Israel
| | - Inge C Gyssens
- Radboud University Medical Center and Radboud Center for Infectious Diseases (RCI), Nijmegen, the Netherlands
| | - Cristina Mussini
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria "Policlinico of Modena," Modena, Italy
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Expanding the role of bacterial vaccines into life-course vaccination strategies and prevention of antimicrobial-resistant infections. NPJ Vaccines 2020; 5:84. [PMID: 32963814 PMCID: PMC7486369 DOI: 10.1038/s41541-020-00232-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/19/2020] [Indexed: 12/28/2022] Open
Abstract
A crisis in bacterial infections looms as ageing populations, increasing rates of bacteraemia and healthcare-associated infections converge with increasing antimicrobial resistance and a paucity of new antimicrobial classes. New initiatives are needed to develop bacterial vaccines for older adults in whom immune senescence plays a critical role. Novel vaccines require an expanded repertoire to prevent mucosal diseases such as pneumonia, skin and soft tissue infections and urinary tract infections that are major causes of morbidity and mortality in the elderly, and key drivers of antimicrobial resistance. This review considers the challenges inherent to the prevention of bacterial diseases, particularly mucosal infections caused by major priority bacterial pathogens against which current vaccines are sub-optimal. It has become clear that prevention of many lung, urinary tract and skin infections requires more than circulating antibodies. Induction of Th1/Th17 cellular responses with tissue-resident memory (Trm) cells homing to mucosal tissues may be a pre-requisite for success.
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Thønnings S, Jansåker F, Sundqvist C, Thudium RF, Nielsen SD, Knudsen JD. Prevalence and recurrence of bacteraemia in hospitalised people who inject drugs - a single Centre retrospective cohort study in Denmark. BMC Infect Dis 2020; 20:634. [PMID: 32847528 PMCID: PMC7448349 DOI: 10.1186/s12879-020-05357-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 08/17/2020] [Indexed: 11/20/2022] Open
Abstract
Background People who inject drugs (PWID) have increased risk of acquiring blood-transmitted chronic viral infections such as Hepatitis B (HBV), Hepatitis C (HCV) and Human Immunodeficiency Virus (HIV) as well as increased risk of acquiring bacterial infections. We aimed to identify and describe bacteraemic episodes, their recurrence rates, predictive and prognostic factors amongst hospitalised PWID. Methods In this retrospective cohort study, we included 257 hospitalised PWID during 2000–2006 with follow up at the Department of Infectious Diseases, Hvidovre Hospital, Denmark. Data collection included comorbidity (HBV-, HCV-, HIV-, and psychiatric comorbidities), social information (contact to an addiction treatment centre, homelessness), opioid substitution treatment (OST), treatment completion and microbiology findings. There was a 10-years follow-up regarding mortality. Results The study identified 257 patients classified as PWID. Of these, 58 (22.6%) had at least one episode of bacteraemia during their first hospital admission. Recurrence was found in 29 (50.0%) of the bacteraemia cases. Staphylococcus aureus was the dominant microorganism of both first and recurrent episodes with 24 (41.4%) and nine (31.4%) of cases, respectively. A psychiatric diagnose was significantly associated with a lower risk of bacteraemia in the multivariate analysis (OR: 0.29, [95%CI: 0.11–0.77], P = 0.01). Mortality was significantly higher in patients with bacteraemia (17.2% vs. 3.0%, P < 0.01, OR: 6.67 [95%CI: 2.33–20], P < 0.01). Conclusions In hospitalised PWID, bacteraemia was found in 22.6% and was associated with at higher mortality. The most common microorganism of bacteraemia was S. aureus. Psychiatric comorbidity was significantly associated with a lower risk of bacteraemia.
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Affiliation(s)
- Sara Thønnings
- Department of Virus & Microbiological Special Diagnostics, Statens Serum Institute, Copenhagen, Denmark
| | - Filip Jansåker
- Department of Clinical Microbiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark. .,Center for Primary Health Care Research, Lund University, Malmö, Sweden.
| | - Christoffer Sundqvist
- Department of Clinical Microbiology, Copenhagen University Hospital, Hvidovre Hospital, Hvidovre, Denmark
| | - Rebekka Faber Thudium
- Department of Infectious Diseases, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Susanne Dam Nielsen
- Department of Infectious Diseases, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Department of Infectious Diseases, Copenhagen University Hospital, Hvidovre Hospital, Hvidovre, Denmark
| | - Jenny Dahl Knudsen
- Department of Clinical Microbiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Department of Clinical Microbiology, Copenhagen University Hospital, Hvidovre Hospital, Hvidovre, Denmark
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Clinical evaluation of cefotiam in the treatment of bacteremia caused by Escherichia coli, Klebsiella species, and Proteus mirabilis: A retrospective study. J Infect Chemother 2020; 26:1158-1163. [PMID: 32828676 DOI: 10.1016/j.jiac.2020.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 05/12/2020] [Accepted: 06/05/2020] [Indexed: 11/21/2022]
Abstract
Bacteremia is often caused by gram-negative bacteria (represented by EKP; Escherichia coli, Klebsiella species, and Proteus mirabilis), and the excessive use of cefazolin, as the first-line antimicrobial in its treatment, has been a source of concern in the emergence of resistant strains. As an antimicrobial, cefotiam may be an alternative to cefazolin; however, little evidence is available for its use in the treatment of bacteremia. The purpose of this non-inferiority study was to retrospectively compare the therapeutic efficacy of cefotiam with some antimicrobials of narrow spectrum (cefazolin, cefmetazole, and flomoxef) in the treatment of EKP-induced bacteremia. The number of patients recruited was 32 in the cefotiam group and 29 in the control group. In the primary endpoint, the survival rate on day 28 for the cefotiam group and the control group was 93.5% and 89.3%, respectively (relative risk at day 28, 1.048; 95% confidence interval, 0.894-1.227). In the secondary end point, treatment success rate in the two groups was 71.9% and 69.0%, respectively (relative risk, 1.042; 95% confidence interval, 0.752-1.445). Intensive care unit admission, low body weight, hypoalbuminemia, and infections unassociated with the urinary tract were identified to be the risk factors responsible for treatment failure. We demonstrated cefotiam may be non-inferior to other antimicrobials of similar spectrum, in terms of survival rate, in EKP-induced bacteremia.
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Tsuzuki S, Matsunaga N, Yahara K, Gu Y, Hayakawa K, Hirabayashi A, Kajihara T, Sugai M, Shibayama K, Ohmagari N. National trend of blood-stream infection attributable deaths caused by Staphylococcus aureus and Escherichia coli in Japan. J Infect Chemother 2020; 26:367-371. [DOI: 10.1016/j.jiac.2019.10.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/21/2019] [Accepted: 10/29/2019] [Indexed: 01/31/2023]
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Fraser C, Muller-Pebody B, Blackburn R, Gray J, Oddie SJ, Gilbert RE, Harron K. Linking surveillance and clinical data for evaluating trends in bloodstream infection rates in neonatal units in England. PLoS One 2019; 14:e0226040. [PMID: 31830076 PMCID: PMC6907823 DOI: 10.1371/journal.pone.0226040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 11/19/2019] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To evaluate variation in trends in bloodstream infection (BSI) rates in neonatal units (NNUs) in England according to the data sources and linkage methods used. METHODS We used deterministic and probabilistic methods to link clinical records from 112 NNUs in the National Neonatal Research Database (NNRD) to national laboratory infection surveillance data from Public Health England. We calculated the proportion of babies in NNRD (aged <1 year and admitted between 2010-2017) with a BSI caused by clearly pathogenic organisms between two days after admission and two days after discharge. We used Poisson regression to determine trends in the proportion of babies with BSI based on i) deterministic and probabilistic linkage of NNRD and surveillance data (primary measure), ii) deterministic linkage of NNRD-surveillance data, iii) NNRD records alone, and iv) linked NNRD-surveillance data augmented with clinical records of laboratory-confirmed BSI in NNRD. RESULTS Using deterministic and probabilistic linkage, 5,629 of 349,740 babies admitted to a NNU in NNRD linked with 6,660 BSI episodes accounting for 38% of 17,388 BSI records aged <1 year in surveillance data. The proportion of babies with BSI due to clearly pathogenic organisms during their NNU admission was 1.0% using deterministic plus probabilistic linkage (primary measure), compared to 1.0% using deterministic linkage alone, 0.6% using NNRD records alone, and 1.2% using linkage augmented with clinical records of BSI in NNRD. Equivalent proportions for babies born before 32 weeks of gestation were 5.0%, 4.8%, 2.9% and 5.9%. The proportion of babies who linked to a BSI decreased by 7.5% each year (95% confidence interval [CI]: -14.3%, -0.1%) using deterministic and probabilistic linkage but was stable using clinical records of BSI or deterministic linkage alone. CONCLUSION Linkage that combines BSI records from national laboratory surveillance and clinical NNU data sources, and use of probabilistic methods, substantially improved ascertainment of BSI and estimates of BSI trends over time, compared with single data sources.
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Affiliation(s)
- Caroline Fraser
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
- * E-mail:
| | | | - Ruth Blackburn
- Institute of Health Informatics, University College London, London, United Kingdom
| | - Jim Gray
- Microbiology, Birmingham Women’s & Children’s Hospitals, Birmingham, United Kingdom
| | - Sam J. Oddie
- Bradford Neonatology, Bradford Royal Infirmary, Bradford, United Kingdom
- Centre for Reviews and Dissemination, University of York, York, United Kingdom
| | - Ruth E. Gilbert
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Katie Harron
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
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Shi MM, Monsel A, Rouby JJ, Xu YP, Zhu YG, Qu JM. Inoculation Pneumonia Caused by Coagulase Negative Staphylococcus. Front Microbiol 2019; 10:2198. [PMID: 31636610 PMCID: PMC6787291 DOI: 10.3389/fmicb.2019.02198] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 09/09/2019] [Indexed: 01/05/2023] Open
Abstract
Rationale Although frequently retrieved in tracheal secretions of critically ill patients on mechanical ventilation, the existence of pneumonia caused by coagulase-negative staphylococci (CoNS) remains controversial. Objective To assess whether Staphylococcus haemolyticus (S. haemolyticus) inoculated in mice’s trachea can infect normal lung parenchyma, increasing concentrations of S. haemolyticus were intratracheally administered in 221 immunocompetent mice. Methods Each animal received intratracheally phosphate-buffered saline (PBS) (n = 43) or live (n = 141) or inactivated (n = 37) S. haemolyticus at increasing load: 1.0 × 106, 1.0 × 107, and 1.0 × 108 colony forming units (CFU). Forty-three animals were sacrificed at 12 h and 178 were sacrificed at 36 h; 64 served for post-mortem lung histology, 157 served for pre-mortem bronchoalveolar lavage (BAL) analysis, and 42 served for post-mortem quantitative bacteriology of lung tissue. The distribution of biofilm-associated genes was investigated in the S. haemolyticus strain used in our in vivo experiment as well as among 19 other clinical S. haemolyticus strains collected from hospitals or nursing houses. Measurements and Main Results Intratracheal inoculation of 1.0 × 108 CFU live S. haemolyticus caused macroscopic and histological confluent pneumonia with significant increase in BAL white cell count, tumor necrosis factor-α (TNF-α), and macrophage inflammatory protein (MIP)-2. At 12 h, high concentrations of S. haemolyticus were identified in BAL. At 36 h, lung injury and BAL inflammation were less severe than at 12 h and moderate concentrations of species belonging to the oropharyngeal flora were identified in lung tissue. The inoculation of 1.0 × 106 and 1.0 × 107 CFU live S. haemolyticus caused histologic interstitial pneumonia and moderate BAL inflammation. Similar results were observed after inoculation of inactivated S. haemolyticus. Moreover, biofilm formation was a common phenotype in S. haemolyticus isolates. The low prevalence of the ica operon in our clinical S. haemolyticus strain collection indicated icaA and icaD independent-biofilm formation. Conclusion In immunocompetent spontaneously breathing mice, inoculation of S. haemolyticus causes concentration-dependent lung infection that spontaneously recovers over time. icaA and icaD independent biofilm formation is a common phenotype in S. haemolyticus isolates.
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Affiliation(s)
- Meng-Meng Shi
- Department of Pulmonary and Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Respiratory Diseases, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Antoine Monsel
- Multidisciplinary Intensive Care Unit, Department of Anesthesiology and Critical Care, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Sorbonne University, Paris, France.,Sorbonne Université, INSERM, UMR-S 959, Immunology-Immunopathology-Immunotherapy (I3), Paris, France.,Biotherapy (CIC-BTi) and Inflammation-Immunopathology-Biotherapy Department (DHU i2B), Hôpital Pitié-Salpêtrière, AP-HP, Paris, France
| | - Jean-Jacques Rouby
- Multidisciplinary Intensive Care Unit, Department of Anesthesiology and Critical Care, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Sorbonne University, Paris, France
| | - Yan-Ping Xu
- Department of Pulmonary and Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Respiratory Diseases, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ying-Gang Zhu
- Department of Pulmonary and Critical Care Medicine, Huadong Hospital, Fudan University, Shanghai, China
| | - Jie-Ming Qu
- Department of Pulmonary and Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Institute of Respiratory Diseases, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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The Epidemiology of Bloodstream Infections and Antimicrobial Susceptibility Patterns: A Nine-Year Retrospective Study at St. Dominic Hospital, Akwatia, Ghana. J Trop Med 2019; 2019:6750864. [PMID: 31641359 PMCID: PMC6770298 DOI: 10.1155/2019/6750864] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 07/23/2019] [Accepted: 08/21/2019] [Indexed: 12/29/2022] Open
Abstract
Background Bloodstream infections are among the top causes of morbidity and mortality in people of all ages, especially in immunocompromised patients in sub-Saharan Africa. This study aimed at describing the epidemiology of bloodstream infections and antimicrobial susceptibility pattern over a nine-year period at St. Dominic Hospital, Akwatia, in the Eastern Region of Ghana. Method This study retrospectively analysed data from 4,489 patients who were referred to the Laboratory Department for blood culture and sensitivity testing from January 2009 to December 2017. Sociodemographic data included age, gender, and patients' department. Blood culture results were retrieved from archival records in the laboratory. The authorities of St. Dominic Hospital granted approval for the study. Results The incidence of bloodstream infection over the 9 years was 51.4 positive cultures per 100,000 hospital attendance. Staphylococcus aureus was the leading causative agent of bacteraemia for the first two scalar years (2009–2011 (38.9%) and 2012–2014 (42.2%)) while coagulase-negative staphylococcus (CoNS) (50.5%) was predominant for the last scalar year (2015–2017), followed by Staphylococcus aureus (169/587 (28.8%)). The highest incidence of bloodstream infections was recorded in the wet seasons (months of May (8.9 per 10,000 persons) and October (10.1 per 10,000 persons)). The bacterial isolates demonstrated high resistance to tetracyclines (390/531 (73.4%)), penicillins (1282/1669 (76.8%)), and sulphonamides (450/499 (90.2%)). Conclusion Bloodstream infection and antimicrobial resistance are high in patients seeking healthcare in Akwatia. This therefore calls for concerted efforts aimed at reducing the incidence in the study area.
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Sauget M, Bouiller K, Richard M, Chagrot J, Cholley P, Hocquet D, Bertrand X. Increasing incidence of bloodstream infections due to Staphylococcus aureus clonal complex 398 in a French hospital between 2010 and 2017. Eur J Clin Microbiol Infect Dis 2019; 38:2127-2132. [DOI: 10.1007/s10096-019-03653-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 07/21/2019] [Indexed: 11/30/2022]
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Diekema DJ, Hsueh PR, Mendes RE, Pfaller MA, Rolston KV, Sader HS, Jones RN. The Microbiology of Bloodstream Infection: 20-Year Trends from the SENTRY Antimicrobial Surveillance Program. Antimicrob Agents Chemother 2019; 63:e00355-19. [PMID: 31010862 PMCID: PMC6591610 DOI: 10.1128/aac.00355-19] [Citation(s) in RCA: 276] [Impact Index Per Article: 55.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 04/07/2019] [Indexed: 01/26/2023] Open
Abstract
Bloodstream infection (BSI) organisms were consecutively collected from >200 medical centers in 45 nations between 1997 and 2016. Species identification and susceptibility testing followed Clinical and Laboratory Standards Institute broth microdilution methods at a central laboratory. Clinical data and isolates from 264,901 BSI episodes were collected. The most common pathogen overall was Staphylococcus aureus (20.7%), followed by Escherichia coli (20.5%), Klebsiella pneumoniae (7.7%), Pseudomonas aeruginosa (5.3%), and Enterococcus faecalis (5.2%). S. aureus was the most frequently isolated pathogen overall in the 1997-to-2004 period, but E. coli was the most common after 2005. Pathogen frequency varied by geographic region, hospital-onset or community-onset status, and patient age. The prevalence of S. aureus isolates resistant to oxacillin (ORSA) increased until 2005 to 2008 and then declined among hospital-onset and community-acquired BSI in all regions. The prevalence of vancomycin-resistant enterococci (VRE) was stable after 2012 (16.4% overall). Daptomycin resistance among S. aureus and enterococci (DRE) remained rare (<0.1%). In contrast, the prevalence of multidrug-resistant (MDR) Enterobacteriaceae increased from 6.2% in 1997 to 2000 to 15.8% in 2013 to 2016. MDR rates were highest among nonfermentative Gram-negative bacilli (GNB), and colistin was the only agent with predictable activity against Acinetobacter baumannii-Acinetobacter calcoaceticus complex (97% susceptible). In conclusion, S. aureus and E. coli were the predominant causes of BSI worldwide during this 20-year surveillance period. Important resistant phenotypes among Gram-positive pathogens (MRSA, VRE, or DRE) were stable or declining, whereas the prevalence of MDR-GNB increased continuously during the monitored period. MDR-GNB represent the greatest therapeutic challenge among common bacterial BSI pathogens.
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Affiliation(s)
| | - Po-Ren Hsueh
- National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | | | - Michael A Pfaller
- University of Iowa, Iowa City, Iowa, USA
- JMI Laboratories, North Liberty, Iowa, USA
| | - Kenneth V Rolston
- The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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Increasing burden of Escherichia coli, Klebsiella pneumoniae, and Enterococcus faecium in hospital-acquired bloodstream infections (2000-2014): A national dynamic cohort study. Infect Control Hosp Epidemiol 2019; 40:705-709. [PMID: 31012402 DOI: 10.1017/ice.2019.59] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The epidemiology of hospital-acquired bloodstream infections (HABSIs) based on the Belgian national surveillance program was analyzed (2000-2014). Our mixed-effects regression analysis identified increased rates of Escherichia coli, Klebsiella pneumoniae, and Enterococcus faecium. HABSI incidence and resistance patterns should be further monitored because of their impact on proper empiric antibiotic therapy.
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Aslam N, Kiran N, Mehdi N, Izhar M, Zia T, Hafsa HT. FREQUENCY OF STAPHYLOCOCCUS AUREUS IN BLOOD STREAM INFECTIONS AND THEIR DRUG SUSCEPTIBILITY PATTERN. GOMAL JOURNAL OF MEDICAL SCIENCES 2019. [DOI: 10.46903/gjms/17.01.1981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Background: Staphylococcus aureus is important cause of blood stream infections. The objectives of this study were to determine the frequency of Staphylococcus aureus in blood stream infections and their antimicrobial drug susceptibility pattern. Materials & Methods: This cross-sectional study was conducted at the Department of Pathology, Shaikh Zayed Hospital, Lahore from April 2018 to March 2019. The sample size was 1527 positive blood cultures for bacteria selected through consecutive sampling technique. Research variables were; presence of positive blood cultures, presence of staphylococci in positive blood cultures, types of staphylococci and types of staphylococcus aereus. Frequency and percentage of blood stream infection caused by Staphylococcus aureus and susceptibility of Staphylococcus aureus to various antimicrobial drugs was detected by disc diffusion and e-strip method. Results: Out of 12744 blood cultures, 1527(11.98%) were positive for bacteria. Out of these 1527, 339(22.20%) were positive for staphylococci. Out of these 339, 87 (5.69%) were staphylococcus aureus. Out of these 87, 48 (3.14%) were methicillin resistant (MRSA). Susceptibility of S. aureus isolates to various commonly used drugs was also detected. Conclusion: Staphylococcus aureus is a significant cause of blood stream infection and can exhibit multi-drug resistance. Therefore drug susceptibility profile of pathogens prevalent in hospital should be monitored and kept in mind when prescribing antimicrobial drugs before getting results of antimicrobial drug susceptibility tests.
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A molecular epidemiological investigation of methicillin-susceptible Staphylococcus aureus causing bloodstream infections in Ireland, 2006–2017. Eur J Clin Microbiol Infect Dis 2019; 38:927-936. [DOI: 10.1007/s10096-019-03523-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 02/27/2019] [Indexed: 01/28/2023]
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