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López-Luis BA, Sifuentes-Osornio J, Lambraño-Castillo D, Ortiz-Brizuela E, Ramírez-Fontes A, Tovar-Calderón YE, Leal-Vega FJ, Bobadilla-Del-Valle M, Ponce-de-León A. Risk factors and outcomes associated with vancomycin-resistant Enterococcus faecium and ampicillin-resistant Enterococcus faecalis bacteraemia: A 10-year study in a tertiary-care centre in Mexico City. J Glob Antimicrob Resist 2020; 24:198-204. [PMID: 33359937 DOI: 10.1016/j.jgar.2020.12.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/31/2020] [Accepted: 12/06/2020] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVES We sought to identify risk factors associated with vancomycin-resistant Enterococcus faecium (VRE) and ampicillin-resistant Enterococcus faecalis (ARE) bacteraemia, predictors of 30-day mortality, and 90-day recurrence-free survival according to resistance. METHODS We evaluated clinical records of patients with E. faecalis and E. faecium bacteraemia (2007-2017). We performed bivariate and multivariate logistic regression analyses to identify factors associated with VRE and ARE bacteraemia and predictors of 30-day mortality. A Kaplan-Meier estimate of 90-day recurrence-free survival was done. RESULTS We identified 192 and 147 E. faecium and E. faecalis bacteraemia episodes, respectively, of which 55.7% of E. faecium were VRE (94% vanA) and 12.2% of E. faecalis were ARE. Factors related to VRE bacteraemia were previous hospitalisation (aOR, 80.18, 95% CI 1.81-634), history of central venous catheter (aOR, 11.15, 95% CI 2.48-50.2) and endotracheal cannula use (aOR, 17.91, 95% CI 1.22-262.82). There was higher attributable mortality to VRE (28%, 95% CI 14-68%; P < 0.001) and ARE (10%, 95% CI 0.1-36%; P = 0.58) compared with their susceptible counterparts. APACHE II (aOR, 1.45, 95% CI 1.26-1.66) and history of chemotherapy (aOR, 3.52, 95% CI 1.09-11.39) were predictors of E. faecium bacteraemia 30-day mortality. We could not recognise any factor related to ARE bacteraemia or E. faecalis 30-day mortality. CONCLUSION History of hospitalisation and invasive device use were related to VRE bacteraemia. APACHE II and history of chemotherapy were predictors of mortality. We could not identify factors related to ARE or predictors of mortality.
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Affiliation(s)
- Bruno Ali López-Luis
- Laboratory of Clinical Microbiology, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Colonia Belisario Domínguez Sección XVI, Delegación Tlalpan, 14080, Mexico City, Mexico
| | - José Sifuentes-Osornio
- Department of Medicine, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Colonia Belisario Domínguez Sección XVI, Delegación Tlalpan, 14080, Mexico City, Mexico
| | - Darwin Lambraño-Castillo
- Laboratory of Clinical Microbiology, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Colonia Belisario Domínguez Sección XVI, Delegación Tlalpan, 14080, Mexico City, Mexico
| | - Edgar Ortiz-Brizuela
- Laboratory of Clinical Microbiology, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Colonia Belisario Domínguez Sección XVI, Delegación Tlalpan, 14080, Mexico City, Mexico
| | - Andrea Ramírez-Fontes
- Laboratory of Clinical Microbiology, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Colonia Belisario Domínguez Sección XVI, Delegación Tlalpan, 14080, Mexico City, Mexico
| | - Yanet Estrella Tovar-Calderón
- Laboratory of Clinical Microbiology, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Colonia Belisario Domínguez Sección XVI, Delegación Tlalpan, 14080, Mexico City, Mexico
| | - Francisco Javier Leal-Vega
- Laboratory of Clinical Microbiology, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Colonia Belisario Domínguez Sección XVI, Delegación Tlalpan, 14080, Mexico City, Mexico
| | - Miriam Bobadilla-Del-Valle
- Laboratory of Clinical Microbiology, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Colonia Belisario Domínguez Sección XVI, Delegación Tlalpan, 14080, Mexico City, Mexico
| | - Alfredo Ponce-de-León
- Laboratory of Clinical Microbiology, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Colonia Belisario Domínguez Sección XVI, Delegación Tlalpan, 14080, Mexico City, Mexico.
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Piezzi V, Gasser M, Atkinson A, Kronenberg A, Vuichard-Gysin D, Harbarth S, Marschall J, Buetti N. Increasing proportion of vancomycin-resistance among enterococcal bacteraemias in Switzerland: a 6-year nation-wide surveillance, 2013 to 2018. ACTA ACUST UNITED AC 2020; 25. [PMID: 32885778 PMCID: PMC7472687 DOI: 10.2807/1560-7917.es.2020.25.35.1900575] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Background Vancomycin-resistant enterococci (VRE), mostly Enterococcus faecium, are multidrug-resistant microorganisms that can cause nosocomial infections. VRE has increased throughout many European countries, but data from Switzerland are scarce. Aim The aim of this work was to characterise the epidemiology of enterococcal bacteraemias in Switzerland with a focus on VRE. Methods In this observational study, we retrospectively investigated bacteraemias from 81 healthcare institutions from January 2013 to December 2018 using data from the Swiss Centre for Antibiotic Resistance. Only the first blood isolate with E. faecalis or E. faecium from an individual patient was considered. We analysed the annual incidences of enterococcal bacteraemias and determined the proportion of VRE over time. We also assessed epidemiological factors potentially associated with VRE bacteraemia. Results We identified 5,369 enterococcal bacteraemias, of which 3,196 (59.5%) were due to E. faecalis and 2,173 (40.5%) to E. faecium. The incidence of enterococcal bacteraemias increased by 3.2% per year (95% confidential interval (CI): 1.6–4.8%), predominantly due to a substantial increase in E. faecalis bacteraemic episodes. Vancomycin resistance affected 30 (1.4%) E. faecium and one E. faecalis bacteraemic episodes. Among all E. faecium bacteraemias, the proportion of vancomycin-resistant isolates increased steadily from 2013 to 2018 (2% per year; 95% CI: 1.5–2.9%). No independent epidemiological factor for higher prevalence of vancomycin-resistant E. faecium bacteraemias was identified. Conclusions Vancomycin-resistant E. faecium bacteraemias remain infrequent in Switzerland. However, an important increase was observed between 2013 and 2018, highlighting the need for implementing active surveillance and targeted prevention strategies in the country.
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Affiliation(s)
- Vanja Piezzi
- Department of Infectious Diseases, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Michael Gasser
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Andrew Atkinson
- Department of Infectious Diseases, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Andreas Kronenberg
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Danielle Vuichard-Gysin
- Department of Internal Medicine, Cantonal Hospital Muensterlingen, Thurgau Hospital Group, Kreuzlingen, Switzerland
| | - Stephan Harbarth
- Infection Control Programme, University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - Jonas Marschall
- Department of Infectious Diseases, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Niccolò Buetti
- IAME, DeSCID team, INSERM, Université Paris Diderot and Sorbonne Paris Cité, Paris, France.,Infection Control Programme, University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland.,Department of Infectious Diseases, Bern University Hospital, University of Bern, Bern, Switzerland
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- The members of the advisory board of ANRESIS are acknowledged at the end of the article
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- The members of Swissnoso are acknowledged at the end of the article
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53
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Fioriti S, Simoni S, Caucci S, Morroni G, Ponzio E, Coccitto SN, Brescini L, Cirioni O, Menzo S, Biavasco F, Giovanetti E, Brenciani A, Vignaroli C. Trend of clinical vancomycin-resistant enterococci isolated in a regional Italian hospital from 2001 to 2018. Braz J Microbiol 2020; 51:1607-1613. [PMID: 32783169 PMCID: PMC7688800 DOI: 10.1007/s42770-020-00360-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/04/2020] [Indexed: 11/25/2022] Open
Abstract
A retrospective study of the epidemiology of vancomycin-resistant enterococci (VRE) in a regional hospital of central Italy in 2001-2018 demonstrated an increased VRE prevalence since 2016. A total of 113 VRE isolates, 89 E. faecium (VREfm) and 24 E. faecalis (VREfs), were collected in the study period. All strains showed high-level resistance to vancomycin; 107 also showed teicoplanin resistance. Altogether, 84 VREfm and 20 VREfs carried vanA, whereas 5 VREfm and 1 VREfs carried vanB. MLST analysis documented that 89 VREfm isolates mainly belonged to ST78, ST80, and ST117. Most strains were isolated from 2001 to 2007, ST78 being the predominant clone. VREfm re-emerged in 2016 with a prevalence of the ST80 lineage. Most VREfs were isolated from 2001 to 2006; although they belonged to 7 different STs, there was a prevalence of ST88 and ST6. Notably, ST88 was sporadically recovered throughout the study period. The increasing rate of VREfm isolation from 2016 to 2018 may be related to the influx of new successful clones and to the renewed and widespread use of vancomycin. Improved infection control measures in hospital wards should be adopted to limit the spread of new epidemic VRE strains.
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Affiliation(s)
- Simona Fioriti
- Unit of Microbiology of Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Via Tronto 10/A, 60126, Ancona, Italy
| | - Serena Simoni
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Sara Caucci
- Unit of Microbiology of Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Via Tronto 10/A, 60126, Ancona, Italy
| | - Gianluca Morroni
- Unit of Microbiology of Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Via Tronto 10/A, 60126, Ancona, Italy
| | - Elisa Ponzio
- Section of Hygiene of Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Sonia Nina Coccitto
- Unit of Microbiology of Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Via Tronto 10/A, 60126, Ancona, Italy
| | - Lucia Brescini
- Infectious Diseases Clinic of Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Oscar Cirioni
- Infectious Diseases Clinic of Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Stefano Menzo
- Unit of Microbiology of Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Via Tronto 10/A, 60126, Ancona, Italy
| | - Francesca Biavasco
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Eleonora Giovanetti
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Andrea Brenciani
- Unit of Microbiology of Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Via Tronto 10/A, 60126, Ancona, Italy.
| | - Carla Vignaroli
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
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Correa-Martínez CL, Becker F, Schwierzeck V, Mellmann A, Brockmann JG, Kampmeier S. Donor-derived vancomycin-resistant enterococci transmission and bloodstream infection after intestinal transplantation. Antimicrob Resist Infect Control 2020; 9:180. [PMID: 33160394 PMCID: PMC7648953 DOI: 10.1186/s13756-020-00845-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 10/28/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Transplant recipients are at high risk for infections. However, donor-recipient transmission of multidrug-resistant organisms (MDROs) remains mostly unaddressed in the protocols of pre-transplant infection and colonization screening. Vancomycin-resistant enterococci (VRE) are MDROs that colonize the gastrointestinal tract and are associated with a significant burden of disease. Besides the high mortality of invasive VRE infections, chronic colonization leads to costly isolation measures in the hospital setting. Whereas most post-transplantation VRE infections are endogenous and thus preceded by colonization of the recipient, conclusive evidence of VRE transmission via allograft in the context of intestinal transplantation is lacking. CASE PRESENTATION We describe a donor-derived VRE infection after intestinal transplantation including small bowel and right hemicolon. The recipient, a 54-year old male with history of mesenteric ischemia and small bowel perforation due to generalized atherosclerosis and chronic stenosis of the celiac trunk and the superior mesenteric artery, developed an intra-abdominal infection and bloodstream infection after transplantation. VRE isolates recovered from the patient as well as from the allograft prior to transplantation were analyzed via whole genome sequencing. Isolates showed to be genetically identical, thus confirming the transmission from donor to recipient. CONCLUSIONS This case underlines the relevance of donor-recipient VRE transmission and invasive infection in the context of intestinal transplantation, highlighting the need for preoperative MDRO screening that facilitates the prompt and effective treatment of possible infections as well as the timely establishment of contact precautions to prevent further spread.
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Affiliation(s)
- Carlos L Correa-Martínez
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany.
| | - Felix Becker
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Waldeyerstraße 1, 48149, Münster, Germany
| | - Vera Schwierzeck
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany
| | - Alexander Mellmann
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany
| | - Jens G Brockmann
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Waldeyerstraße 1, 48149, Münster, Germany
| | - Stefanie Kampmeier
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany.,Institute of Medical Microbiology, University Hospital Münster, Domgakstraße 10, 48149, Münster, Germany
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Schmitz D, Eigner U, Schmidt-Wieland T, Weber P, Magdeburg R, Kienle P, Rudi J. Gallbladder Cancer Presenting as Mirizzi Syndrome Complicated by Rapidly Evolving 23 rRNA Gene-Linezolid Resistance with Vancomycin-Resistant Enterococcus Infection Resulting in Fatal Cholangial Sepsis. Case Rep Gastroenterol 2020; 14:540-546. [PMID: 33250695 PMCID: PMC7670345 DOI: 10.1159/000508851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 05/19/2020] [Indexed: 12/14/2022] Open
Abstract
We describe the case of a 71-year-old woman who presented with obstructive jaundice and subhilar bile duct stenosis. MRI showed extensive cholecystolithiasis with an impacted bile stone in the cystic duct suggesting Mirizzi syndrome. Delayed enhancement of the thickened gallbladder wall suggested inflammation instead of carcinoma. After drainage of the obstructed bile duct via ERCP, the patient developed liver abscesses with a nosocomial vancomycin-resistant enterococcus infection treated by linezolid. After 4 weeks, the VRE infection was complicated by a new-onset 23 rRNA gene-mediated linezolid resistance in the same bacterial strain, which was proven via core genome multilocus sequencing. Meropenem and tigecycline were administered according to a resistogram. Furthermore, percutaneous transhepatic biliary drainage of both sides of the liver was necessary. After demission, the patient had to be admitted again due to septic shock. An emergency operation revealed extended, inoperable gallbladder cancer. The patient died a few days later in the intensive care unit. An earlier diagnosis of bile duct infiltrating gallbladder cancer by cholangioscopy or laparoscopy and treatment of vancomycin-resistant enterococcus infection with daptomycin may have changed the clinical course of the disease.
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Affiliation(s)
- Daniel Schmitz
- Department of Gastroenterology, Oncology and Diabetology, Teaching Hospital of University of Heidelberg, Theresienkrankenhaus and St. Hedwig Klinik GmbH, Mannheim, Germany
| | - Ulrich Eigner
- Department of Microbiology and Infectiology, Medical Service Centre Laboratory Dr. Limbach and Colleagues, Heidelberg, Germany
| | - Torsten Schmidt-Wieland
- Department of Microbiology and Infectiology, Medical Service Centre Laboratory Dr. Limbach and Colleagues, Heidelberg, Germany
| | - Petra Weber
- Institute for Hospital Hygiene, Teaching Hospital of University of Heidelberg, Theresienkrankenhaus and St. Hedwig Klinik GmbH, Mannheim, Germany
| | - Richard Magdeburg
- Department of General and Visceral Surgery, Teaching Hospital of University of Heidelberg, Theresienkrankenhaus and St. Hedwig Klinik GmbH, Mannheim, Germany
| | - Peter Kienle
- Department of General and Visceral Surgery, Teaching Hospital of University of Heidelberg, Theresienkrankenhaus and St. Hedwig Klinik GmbH, Mannheim, Germany
| | - Jochen Rudi
- Department of Gastroenterology, Oncology and Diabetology, Teaching Hospital of University of Heidelberg, Theresienkrankenhaus and St. Hedwig Klinik GmbH, Mannheim, Germany
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VanA rectal swab screening as a predictor of subsequent vancomycin-resistant enterococcal bloodstream infection in critically ill adults. Infect Control Hosp Epidemiol 2020; 42:411-416. [PMID: 33054879 DOI: 10.1017/ice.2020.1218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVE To evaluate whether vanA rectal screening for vancomycin-resistant Enterococcus (VRE) predicts vancomycin resistance for patients with enterococcal bloodstream infection (BSI). DESIGN A retrospective cohort study. SETTING Large academic medical center. METHODS The predictive performance of a vanA rectal swab was evaluated in 161 critically ill adults with an enterococcal BSI from January 1, 2007, to September 1, 2014, and who had a vanA rectal swab screening obtained within 14 days prior to blood culture. RESULTS Of the patients meeting inclusion criteria, 83 (51.6%) were vanA swab positive. Rectal-swab-positive patients were more likely to be younger, to be immunocompromised, to have an indwelling central vascular catheter, and to have a history of MDR bacteria. The vanA rectal swab had sensitivity and negative predictive values of 83.6% and 85.9%, respectively, and specificity and positive predictive values of 71.3% and 67.5%, respectively, for predicting a vancomycin-resistant enterococcal BSI in critically ill adults. CONCLUSIONS VanA rectal swabs may be useful for antimicrobial stewardship at institutions with VRE screening already in place for infection control purposes. A higher PPV would be warranted to implement a universal vanA screen on all ICU patients.
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Synergistic activity of fosfomycin and chloramphenicol against vancomycin-resistant Enterococcus faecium (VREfm) isolates from bloodstream infections. Diagn Microbiol Infect Dis 2020; 99:115241. [PMID: 33130503 DOI: 10.1016/j.diagmicrobio.2020.115241] [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: 05/05/2020] [Revised: 09/29/2020] [Accepted: 10/09/2020] [Indexed: 11/20/2022]
Abstract
Vancomycin-resistant Enterococcus faecium (VREfm) infections are increasing. Current anti-VREfm options (linezolid and daptomycin) are suboptimal. Fosfomycin maintains good efficacy against VREfm and chloramphenicol is active against ≥ 90% of VREfm. We tested chloramphenicol + fosfomycin (CAF+FOS) against 10 VREfm isolated from blood. MICs were 64 to 512 µg/mL for fosfomycin and 8 to 16 µg/mL for chloramphenicol. The combination decreased both MICs, with a synergic effect in 50% of the isolates and an additive effect in the remaining 50%. Time-kill assays performed on fractional inhibitory concentration index ≤ 0.5 strains confirmed the synergism. The antibiotic combination at ¼ of minimum inhibitory concentrations (MICs) caused a ≥ 2 log10 reduction compared to the two antibiotics alone. Finally, we provided a proof of concept of the in vitro efficacy of CAF+FOS in G. mellonella. The survival of G. mellonella larvae treated with the combination was significantly higher. The activity of fosfomycin and chloramphenicol against VREfm increases when they are used in combination.
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58
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Erdem F, Kayacan C, Oncul O, Karagoz A, Aktas Z. Clonal distribution of vancomycin-resistant Enterococcus faecium in Turkey and the new singleton ST733. J Clin Lab Anal 2020; 34:e23541. [PMID: 33025699 PMCID: PMC7755804 DOI: 10.1002/jcla.23541] [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: 05/14/2020] [Revised: 07/28/2020] [Accepted: 07/29/2020] [Indexed: 01/07/2023] Open
Abstract
Background The aim of this study was to provide information about the spread and characteristics of the vancomycin‐resistant Enterococcus faecium isolates (VREfm) in Turkey. Methods Seventy‐one nonduplicate consecutive isolates of VREfm were obtained from various clinical specimens of inpatients treated at university or training hospitals in seven regions of Turkey. Further characteristics included antibiotic susceptibility testing, pulsed‐field gel electrophoresis (PFGE) of SmaI‐digested genomic DNA, and multilocus sequence typing (MLST) of selected isolates. The presence of vancomycin resistance and virulence genes (esp and hyl) was investigated by polymerase chain reaction (PCR). Results All VREfm isolates had MICs to vancomycin of ≥32 mg/L and contained the vanA gene. The presence of esp gene was identified in 64 and hyl in eight VREfm isolates. All VREfm showed the multiresistance phenotype, including ampicillin (99%), penicillin (99%), imipenem (99%), ciprofloxacin (87%), moxifloxacin (87%), erythromycin (97%), streptomycin (86%), gentamicin (82%), tetracycline (70%), and teicoplanin (99%). All were susceptible to tigecycline while quinupristin‐dalfopristin (97%) and linezolid (93%) were the most active other agents. Analysis of the PFGE profiles showed that 53 (74.6%) VREfm isolates shared a similar electrophoretic profile, designed as type 1, and were closely related (>85%). The sequence type was identified by MLST in 44 VRE isolates with unrelated or closely related PFGE patterns. MLST revealed that nosocomial spread of VREfm resulted from dissemination of lineage C1 E faecium clones. Sequence types ST78, ST203, and ST117 were the most frequently isolated. This is the first report of ST733 around the world. Conclusions Lineage C1 clones are disseminated among clinical VREfm isolates in seven different regions in Turkey. Regarding VREfm isolates, the worldwide epidemic strains are in circulation in Turkey.
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Affiliation(s)
- Fatma Erdem
- Department of Clinical Microbiology, Adana City Training and Research Hospital, Adana, Turkey
| | - Cigdem Kayacan
- Department of Medical Microbiology, Faculty of Medicine, Istanbul Aydin University, Istanbul, Turkey
| | - Oral Oncul
- Department of Infectious Disease and Clinical Microbiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | | | - Zerrin Aktas
- Department of Clinical Microbiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
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59
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Kampmeier S, Tönnies H, Correa-Martinez CL, Mellmann A, Schwierzeck V. A nosocomial cluster of vancomycin resistant enterococci among COVID-19 patients in an intensive care unit. Antimicrob Resist Infect Control 2020; 9:154. [PMID: 32962759 PMCID: PMC7506805 DOI: 10.1186/s13756-020-00820-8] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/16/2020] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Currently, hospitals have been forced to divert substantial resources to cope with the ongoing coronavirus disease 2019 (COVID-19) pandemic. It is unclear if this situation will affect long-standing infection prevention practices and impact on healthcare associated infections. Here, we report a nosocomial cluster of vancomycin-resistant enterococci (VRE) that occurred on a COVID-19 dedicated intensive care unit (ICU) despite intensified contact precautions during the current pandemic. Whole genome sequence-based typing (WGS) was used to investigate genetic relatedness of VRE isolates collected from COVID-19 and non-COVID-19 patients during the outbreak and to compare them to environmental VRE samples. METHODS Five VRE isolated from patients (three clinical and two screening samples) as well as 11 VRE and six vancomycin susceptible Enterococcus faecium (E. faecium) samples from environmental sites underwent WGS during the outbreak investigation. Isolate relatedness was determined using core genome multilocus sequence typing (cgMLST). RESULTS WGS revealed two genotypic distinct VRE clusters with genetically closely related patient and environmental isolates. The cluster was terminated by enhanced infection control bundle strategies. CONCLUSIONS Our results illustrate the importance of continued adherence to infection prevention and control measures during the COVID-19 pandemic to prevent VRE transmission and healthcare associated infections.
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Affiliation(s)
- Stefanie Kampmeier
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany.
| | - Hauke Tönnies
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany
| | - Carlos L Correa-Martinez
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany
| | - Alexander Mellmann
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany
| | - Vera Schwierzeck
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany
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Kim HJ, Koo M. Occurrence, Antimicrobial Resistance and Molecular Diversity of Enterococcus faecium in Processed Pork Meat Products in Korea. Foods 2020; 9:foods9091283. [PMID: 32932635 PMCID: PMC7555021 DOI: 10.3390/foods9091283] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/04/2020] [Accepted: 09/09/2020] [Indexed: 02/01/2023] Open
Abstract
Because Enterococcus faecium is an important nosocomial pathogen and sentinel organism for tracking antimicrobial resistance, information on the contamination and antimicrobial resistance patterns of E. faecium in food are essential to public health and food safety. We analyzed the occurrence of E. faecium in retail pork meat products (n = 124), and antimicrobial resistance of 30 E. faecium isolates were examined against 14 antimicrobials using the broth dilution test and disc diffusion test. Rep-PCR-based molecular diversity was also analyzed using Deviersilab. The highest contamination of enterococci was observed for minced pork meat but most of the E. faecium was isolated from meatball-type frozen pork meat products (FP). Incidences of antimicrobial-resistant E. faecium against erythromycin, clindamycin and nitrofurantoin were 80%, 50% and 20%, respectively. No vancomycin-resistant enterococci were analyzed. Rep-PCR showed distinctive clusters with a similarity ≥ 98%, consisting of 18 E. faecium isolates from FP manufactured in seven companies. The analyzed data on the contamination and antimicrobial resistance patterns combined with molecular typing can be useful to derive risk management of antimicrobial-resistant enterococci in food.
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Affiliation(s)
- Hyun Jung Kim
- Research Group of Consumer Safety, Korea Food Research Institute, Wanju, Jeollabuk-do 55365, Korea
- Department of Food Biotechnology, University of Science and Technology, Daejeon 34113, Korea;
- Correspondence: ; Tel.: +82-63-219-9271
| | - Minseon Koo
- Department of Food Biotechnology, University of Science and Technology, Daejeon 34113, Korea;
- Food Analysis Center, Korea Food Research Institute, Wanju, Jeollabuk-do 55365, Korea
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Omadacycline invitro activity against a molecularly characterized collection of clinical isolates with known acquired tetracycline resistance mechanisms. Diagn Microbiol Infect Dis 2020; 97:115054. [PMID: 32376058 DOI: 10.1016/j.diagmicrobio.2020.115054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/28/2020] [Indexed: 01/13/2023]
Abstract
Omadacycline and tigecycline MIC90 values were 2 μg/mL and 0.25 μg/mL, respectively, against Staphylococcus aureus carrying tet(M), whereas the minocycline, tetracycline, and doxycycline values were > 8 μg/mL. Similarly, omadacycline and tigecycline remained active against Enterococcus faecalis and Streptococcus pneumoniae harboring tet(L)and/or tet(M)(MIC90, 0.06-0.25 μg/mL), whereas other tetracyclines were inactive (MIC90, >8 μg/mL). Omadacycline and tigecycline remained more potent than minocycline, tetracycline, and doxycycline against Enterobacteriaceae carrying tet. This study demonstrates the effectiveness of modern tetracyclines, omadacycline, and tigecycline against isolates with tetracycline resistance genes.
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Fodor A, Abate BA, Deák P, Fodor L, Gyenge E, Klein MG, Koncz Z, Muvevi J, Ötvös L, Székely G, Vozik D, Makrai L. Multidrug Resistance (MDR) and Collateral Sensitivity in Bacteria, with Special Attention to Genetic and Evolutionary Aspects and to the Perspectives of Antimicrobial Peptides-A Review. Pathogens 2020; 9:pathogens9070522. [PMID: 32610480 PMCID: PMC7399985 DOI: 10.3390/pathogens9070522] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 06/23/2020] [Accepted: 06/23/2020] [Indexed: 12/18/2022] Open
Abstract
Antibiotic poly-resistance (multidrug-, extreme-, and pan-drug resistance) is controlled by adaptive evolution. Darwinian and Lamarckian interpretations of resistance evolution are discussed. Arguments for, and against, pessimistic forecasts on a fatal “post-antibiotic era” are evaluated. In commensal niches, the appearance of a new antibiotic resistance often reduces fitness, but compensatory mutations may counteract this tendency. The appearance of new antibiotic resistance is frequently accompanied by a collateral sensitivity to other resistances. Organisms with an expanding open pan-genome, such as Acinetobacter baumannii, Pseudomonas aeruginosa, and Klebsiella pneumoniae, can withstand an increased number of resistances by exploiting their evolutionary plasticity and disseminating clonally or poly-clonally. Multidrug-resistant pathogen clones can become predominant under antibiotic stress conditions but, under the influence of negative frequency-dependent selection, are prevented from rising to dominance in a population in a commensal niche. Antimicrobial peptides have a great potential to combat multidrug resistance, since antibiotic-resistant bacteria have shown a high frequency of collateral sensitivity to antimicrobial peptides. In addition, the mobility patterns of antibiotic resistance, and antimicrobial peptide resistance, genes are completely different. The integron trade in commensal niches is fortunately limited by the species-specificity of resistance genes. Hence, we theorize that the suggested post-antibiotic era has not yet come, and indeed might never come.
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Affiliation(s)
- András Fodor
- Department of Genetics, University of Szeged, H-6726 Szeged, Hungary;
- Correspondence: or (A.F.); (L.M.); Tel.: +36-(30)-490-9294 (A.F.); +36-(30)-271-2513 (L.M.)
| | - Birhan Addisie Abate
- Ethiopian Biotechnology Institute, Agricultural Biotechnology Directorate, Addis Ababa 5954, Ethiopia;
| | - Péter Deák
- Department of Genetics, University of Szeged, H-6726 Szeged, Hungary;
- Institute of Biochemistry, Biological Research Centre, H-6726 Szeged, Hungary
| | - László Fodor
- Department of Microbiology and Infectious Diseases, University of Veterinary Medicine, P.O. Box 22, H-1581 Budapest, Hungary;
| | - Ervin Gyenge
- Hungarian Department of Biology and Ecology, Faculty of Biology and Geology, Babeș-Bolyai University, 5-7 Clinicilor St., 400006 Cluj-Napoca, Romania; (E.G.); (G.S.)
- Institute for Research-Development-Innovation in Applied Natural Sciences, Babeș-Bolyai University, 30 Fântânele St., 400294 Cluj-Napoca, Romania
| | - Michael G. Klein
- Department of Entomology, The Ohio State University, 1680 Madison Ave., Wooster, OH 44691, USA;
| | - Zsuzsanna Koncz
- Max-Planck Institut für Pflanzenzüchtungsforschung, Carl-von-Linné-Weg 10, D-50829 Köln, Germany;
| | | | - László Ötvös
- OLPE, LLC, Audubon, PA 19403-1965, USA;
- Institute of Medical Microbiology, Semmelweis University, H-1085 Budapest, Hungary
- Arrevus, Inc., Raleigh, NC 27612, USA
| | - Gyöngyi Székely
- Hungarian Department of Biology and Ecology, Faculty of Biology and Geology, Babeș-Bolyai University, 5-7 Clinicilor St., 400006 Cluj-Napoca, Romania; (E.G.); (G.S.)
- Institute for Research-Development-Innovation in Applied Natural Sciences, Babeș-Bolyai University, 30 Fântânele St., 400294 Cluj-Napoca, Romania
- Centre for Systems Biology, Biodiversity and Bioresources, Babeș-Bolyai University, 5-7 Clinicilor St., 400006 Cluj-Napoca, Romania
| | - Dávid Vozik
- Research Institute on Bioengineering, Membrane Technology and Energetics, Faculty of Engineering, University of Veszprem, H-8200 Veszprém, Hungary; or or
| | - László Makrai
- Department of Microbiology and Infectious Diseases, University of Veterinary Medicine, P.O. Box 22, H-1581 Budapest, Hungary;
- Correspondence: or (A.F.); (L.M.); Tel.: +36-(30)-490-9294 (A.F.); +36-(30)-271-2513 (L.M.)
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Rodríguez-Noriega E, Hernández-Morfin N, Garza-Gonzalez E, Bocanegra-Ibarias P, Flores-Treviño S, Esparza-Ahumada S, González-Díaz E, Pérez-Gómez HR, Mendoza-Mujica C, León-Garnica G, Morfín-Otero R. Risk factors and outcome associated with the acquisition of linezolid-resistant Enterococcus faecalis. J Glob Antimicrob Resist 2020; 21:405-409. [DOI: 10.1016/j.jgar.2020.01.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/25/2019] [Accepted: 01/13/2020] [Indexed: 01/13/2023] Open
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Jahanbakhsh S, Singh NB, Yim J, Kebriaei R, Smith JR, Lev K, Tran TT, Rose WE, Arias CA, Rybak MJ. Impact of Daptomycin Dose Exposure Alone or in Combination with β-Lactams or Rifampin against Vancomycin-Resistant Enterococci in an In Vitro Biofilm Model. Antimicrob Agents Chemother 2020; 64:e02074-19. [PMID: 32094136 PMCID: PMC7179592 DOI: 10.1128/aac.02074-19] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 02/19/2020] [Indexed: 12/22/2022] Open
Abstract
Enterococcus faecium strains are commonly resistant to vancomycin and β-lactams. In addition, E. faecium often causes biofilm-associated infections and these infections are difficult to treat. In this context, we investigated the activity of dosing regimens using daptomycin (DAP) (8, 10, 12, and 14 mg/kg of body weight/day) alone and in combination with ceftaroline (CPT), ampicillin (AMP), ertapenem (ERT), and rifampin (RIF) against 2 clinical strains of biofilm-producing vancomycin-resistant Enterococcus faecium (VREfm), namely, strains S447 and HOU503, in an in vitro biofilm model. HOU503 harbors common LiaS and LiaR substitutions, whereas S447 lacks mutations associated with the LiaFSR pathway. MIC results demonstrated that both strains were susceptible to DAP and resistant to CPT, AMP, ERT, and RIF. The 168-h pharmacokinetic/pharmacodynamic (PK/PD) CDC biofilm reactor models (simulating human antibiotic exposures) were used with titanium and polyurethane coupons to evaluate the efficacy of antibiotic combinations. DAP 12 and 14 achieved bactericidal activity against S447 but lacked such effect against HOU503. Addition of ERT and RIF enhanced DAP activity, allowing DAP 8 and 10 plus ERT or RIF to produce bactericidal activity against both strains at 168 h. While DAP 8 and 10 plus CPT improved killing, they did not reach bactericidal reduction against S447. Combination of AMP, CPT, ERT, or RIF resulted in enhanced and bactericidal activity for DAP against HOU503 at 168 h. Our data provide further support for the use of combinations of DAP with AMP, ERT, CPT, and RIF in infections caused by biofilm producing VREfm. Further research involving DAP combinations against biofilm-producing enterococci is warranted.
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Affiliation(s)
- Seyedehameneh Jahanbakhsh
- Anti-Infective Research Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan, USA
| | - Nivedita B Singh
- Anti-Infective Research Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan, USA
| | - Juwon Yim
- Anti-Infective Research Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan, USA
| | - Razieh Kebriaei
- Anti-Infective Research Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan, USA
| | - Jordan R Smith
- Anti-Infective Research Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan, USA
| | - Katherine Lev
- Anti-Infective Research Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan, USA
| | - T T Tran
- School of Pharmacy and Department of Medicine, University of Wisconsin-Madison, Wisconsin, USA
| | - Warren E Rose
- School of Pharmacy and Department of Medicine, University of Wisconsin-Madison, Wisconsin, USA
| | - Cesar A Arias
- Division of Infectious Diseases and Center for Antimicrobial Resistance and Microbial Genomics, UTHealth McGovern Medical School, Houston, Texas, USA
- Center for Infectious Diseases, UTHealth School of Public Health, Universidad El Bosque, Bogota, Colombia
- Molecular Genetics and Antimicrobial Resistance Unit-International Center for Microbial Genomics, Universidad El Bosque, Bogota, Colombia
| | - Michael J Rybak
- Anti-Infective Research Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan, USA
- School of Medicine, Wayne State University, Detroit, Michigan, USA
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Linezolid Concentrations in Plasma and Subcutaneous Tissue are Reduced in Obese Patients, Resulting in a Higher Risk of Underdosing in Critically Ill Patients: A Controlled Clinical Pharmacokinetic Study. J Clin Med 2020; 9:jcm9041067. [PMID: 32283731 PMCID: PMC7230366 DOI: 10.3390/jcm9041067] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 03/27/2020] [Accepted: 04/07/2020] [Indexed: 01/11/2023] Open
Abstract
Background: Linezolid is used for the treatment of soft tissue infections in critically ill patients. However, data for characterizing the pharmacokinetics (PK) and assessing whether effective concentrations are reached at the target site are lacking. We hypothesized that current dosing regimens do not lead to effective concentrations in the plasma and interstitial fluid (ISF) of subcutaneous tissue in obese patients. Methods: As a controlled clinical model, critically ill obese and non-obese patients undergoing intra-abdominal surgery received 600 mg linezolid as a single infusion. Concentrations in the plasma and microdialysate from the ISF of subcutaneous tissue were determined up to 8 h after dosing. Pharmacokinetic analysis was performed by non-compartmental methods. As a therapeutic target, we used fAUC/MIC > 80. Results: Fifteen obese (BMI: 48.7 ± 11.2 kg/m2) and 15 non-obese (23.9 ± 2.1 kg/m2) patients were analyzed. AUC0–8 in ISF decreased by −1.69 mg*h/L (95% CI: −2.59 to −0.79, p < 0.001) for every 10 kg increase in weight. PK in obese patients were characterized by lower maximal plasma concentrations (median 3.8 vs. 8.3 mg/L, p < 0.001) and a higher volume of distribution (41.0 vs. 30.8 L, p < 0.001), and the therapeutic target was not reached for MIC ≥ 1 mg/L in ISF and ≥ 2 mg/L in plasma. Conclusions: Increasing the weight led to a decrease of linezolid concentrations in the plasma and subcutaneous tissue. The current dosing regimen does not seem to produce sufficient concentrations to kill bacteria with MIC ≥ 2 mg/L, especially as empirical antimicrobial therapy in critically ill obese patients.
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Schell CM, Tedim AP, Rodríguez-Baños M, Sparo MD, Lissarrague S, Basualdo JA, Coque TM. Detection of β-Lactamase-Producing Enterococcus faecalis and Vancomycin-Resistant Enterococcus faecium Isolates in Human Invasive Infections in the Public Hospital of Tandil, Argentina. Pathogens 2020; 9:pathogens9020142. [PMID: 32093230 PMCID: PMC7168638 DOI: 10.3390/pathogens9020142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/17/2020] [Accepted: 02/18/2020] [Indexed: 12/27/2022] Open
Abstract
The study’s aim was to analyze the population structure of enterococci causing human invasive infections in a medium-sized Argentinian Hospital coincidental with a 5 year-period of increased recovery of antibiotic resistant enterococci (2010–2014). Species identification (biochemical testing/MALDI-TOF-MS), antimicrobial susceptibility (disk-diffusion) and clonal relatedness (PFGE/MLST/BAPS) were determined according to standard guidelines. β-lactamase production was determined by a nitrocefin test and confirmed by PCR/sequencing. The isolates were identified as Enterococcus faecalis and Enterococcus faecium at a 2:1 ratio. Most of the E. faecalis isolates, grouped in 25 PFGE-types (ST9/ST179/ST236/ST281/ST388/ST604/ST720), were resistant to high-levels (HLR) of gentamicin/streptomycin. A ST9 clone (bla+/HLR-gentamicin) was detected in patients of different wards during 2014. E. faecium isolates were grouped in 10 PFGE-types (ST25/ST18/ST19/ST52/ST792), with a low rate of ampicillin resistance. Five vancomycin-resistant E. faecium, three vanA (ST792/ST25) and two vanB (ST25) were detected. The ST25 clone carried either vanA or vanB. The recovery of a bla+-ST9-E. faecalis clone similar to that described in the late 1980s in Argentina suggests the possibility of a local hidden reservoir. These results reflect the relevance of local epidemiology in understanding the population structure of enterococci as well as the emergence and spread of antimicrobial resistance in predominant enterococcal clonal lineages.
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Affiliation(s)
- Celia M. Schell
- Centro Universitario de Estudios Microbiológicos y Parasitológicos (CUDEMyP), Centro Universidad Nacional de La Plata asociado a Comisión de Investigaciones Científicas (CIC), Facultad de Ciencias Médicas, Universidad Nacional de La Plata. Av. 60 y 120 s/n, 3er piso, CP 1900 La Plata, Buenos Aires, Argentina or (M.D.S.); (J.A.B.)
| | - Ana P. Tedim
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Carretera de Colmenar, km. 9.1, Planta -1IZQ, 28034 Madrid, Spain or (A.P.T.); (M.R.-B.)
- Centros de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBER-ESP), Av. Monforte de Lemos, 3-5. Pabellón 11. Planta 0, 28029 Madrid, Spain
| | - Mercedes Rodríguez-Baños
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Carretera de Colmenar, km. 9.1, Planta -1IZQ, 28034 Madrid, Spain or (A.P.T.); (M.R.-B.)
| | - Mónica D. Sparo
- Centro Universitario de Estudios Microbiológicos y Parasitológicos (CUDEMyP), Centro Universidad Nacional de La Plata asociado a Comisión de Investigaciones Científicas (CIC), Facultad de Ciencias Médicas, Universidad Nacional de La Plata. Av. 60 y 120 s/n, 3er piso, CP 1900 La Plata, Buenos Aires, Argentina or (M.D.S.); (J.A.B.)
- Laboratorio de Microbiología Clínica, Hospital Municipal Ramón Santamarina, Gral. Paz 1406, B7000 Tandil, Buenos Aires, Argentina
| | - Sabina Lissarrague
- Laboratorio de Microbiología Clínica, Hospital Municipal Ramón Santamarina, Gral. Paz 1406, B7000 Tandil, Buenos Aires, Argentina
| | - Juan A. Basualdo
- Centro Universitario de Estudios Microbiológicos y Parasitológicos (CUDEMyP), Centro Universidad Nacional de La Plata asociado a Comisión de Investigaciones Científicas (CIC), Facultad de Ciencias Médicas, Universidad Nacional de La Plata. Av. 60 y 120 s/n, 3er piso, CP 1900 La Plata, Buenos Aires, Argentina or (M.D.S.); (J.A.B.)
| | - Teresa M. Coque
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Carretera de Colmenar, km. 9.1, Planta -1IZQ, 28034 Madrid, Spain or (A.P.T.); (M.R.-B.)
- Centros de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBER-ESP), Av. Monforte de Lemos, 3-5. Pabellón 11. Planta 0, 28029 Madrid, Spain
- Unidad de Resistencia a Antibióticos y Virulencia Bacteriana asociada al Consejo Superior de Investigaciones Científicas (CSIC), 28006 Madrid, Spain
- Correspondence: or ; Tel.: +34-913-368-330
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Correa-Martinez CL, Tönnies H, Froböse NJ, Mellmann A, Kampmeier S. Transmission of Vancomycin-Resistant Enterococci in the Hospital Setting: Uncovering the Patient-Environment Interplay. Microorganisms 2020; 8:microorganisms8020203. [PMID: 32024001 PMCID: PMC7074967 DOI: 10.3390/microorganisms8020203] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/27/2020] [Accepted: 01/30/2020] [Indexed: 12/17/2022] Open
Abstract
Vancomycin-resistant enterococci (VRE) are relevant nosocomial pathogens with an increasing incidence in the last decades. Their transmission is optimal in the hospital setting, as it offers two potential, large reservoirs that are closely related: susceptible patients and their environment. Here we investigate the role of the hospital environment in the nosocomial transmission of VRE by establishing concrete links between contaminated surfaces and colonized/infected patients in outbreak and non-outbreak settings. Environmental and patient VRE isolates were collected between 2013 and 2019 and analyzed by whole-genome sequencing (WGS), subsequent multilocus sequence typing (MLST), and core genome (cg) MLST. Pairs of isolates differing in <3 alleles were rated as closely related, making a transmission likely. Fifty-three environmental VRE isolates were analyzed. MLST sequence types (ST) ST203 (50.0%), ST192 (21.3%), ST117 (17.3%), ST721 (8.8%), ST80 (2%), and ST1489 (0.7%) were detected, carrying the resistance determinants vanA (72.7%), vanB (24%), or both (3.3%). Of the 53 environmental isolates, 51 were found to form five clusters with genetically related patient isolates (n = 97 isolates). WGS confirms the role of the environment in the transmission dynamics of VRE in both the outbreak and non-outbreak settings, highlighting the importance of prevention and control of VRE spread.
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Affiliation(s)
- Carlos L. Correa-Martinez
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149 Münster, Germany; (C.L.C.-M.); (H.T.); (A.M.)
| | - Hauke Tönnies
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149 Münster, Germany; (C.L.C.-M.); (H.T.); (A.M.)
| | - Neele J. Froböse
- Institute of Medical Microbiology, University Hospital Münster, Domagkstraße 10, 48149 Münster, Germany;
| | - Alexander Mellmann
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149 Münster, Germany; (C.L.C.-M.); (H.T.); (A.M.)
| | - Stefanie Kampmeier
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149 Münster, Germany; (C.L.C.-M.); (H.T.); (A.M.)
- Correspondence: ; Tel.: +49-25-1835-2316
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In vitro synergy with fosfomycin plus doxycyclin against linezolid and vancomycin-resistant Enterococcus faecium. J Glob Antimicrob Resist 2020; 22:78-83. [PMID: 32007618 DOI: 10.1016/j.jgar.2020.01.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 12/05/2019] [Accepted: 01/20/2020] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE Linezolid and vancomycin-resistant Enterococcus faecium (LRVREF) is globally emerging as a urinary nosocomial pathogen. A decrease in the amount of successful treatment options has created a necessity for the development of novel antimicrobial therapies. Combination therapy may provide an effective alternative for treatment. Fosfomycin and doxycyclin are currently used individually for the treatment of urinary tract infections. Fosfomycin has recently seen increased use because of its persistent activity against a large spectrum of multidrug-resistant organisms. The purpose of this study was to investigate the interaction of fosfomycin plus doxycyclin against LRVREF isolates. METHODS MICs for fosfomycin and doxycyclin were determined for 24 unique clinical LRVREF isolates (4%, fosfomycin-susceptible; 92%, doxycyclin-susceptible). In vitro synergy testing with the combination of fosfomycin and doxycyclin was performed using an Etest method and time-kill assay. RESULTS The combination of fosfomycin and doxycyclin demonstrated synergy with the Etest method in 11/24 (46%) isolates and in 10/24 (42%) isolates by the time-kill assay. Results from the Etest method and time-kill assay were in agreement for 7/24 (29.2%) of isolates. No antagonism was found. CONCLUSIONS The combination of fosfomycin and doxycyclin should be evaluated further with additional LRVREF isolates. In vivo studies should also be performed before use in clinical situations.
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Bender JK, Klare I, Fleige C, Werner G. A Nosocomial Cluster of Tigecycline- and Vancomycin-Resistant Enterococcus faecium Isolates and the Impact of rpsJ and tet(M) Mutations on Tigecycline Resistance. Microb Drug Resist 2019; 26:576-582. [PMID: 31895641 DOI: 10.1089/mdr.2019.0346] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Tigecycline-resistant enterococci are only rarely detected worldwide. In 2017, the National Reference Centre for Staphylococci and Enterococci noticed a nosocomial cluster of tigecycline- and vancomycin-resistant Enterococcus faecium (TVRE) in a hospital of tertiary care in Northern Germany. Nineteen E. faecium isolates were analyzed by means of antimicrobial susceptibility testing and pulsed-field gel electrophoresis. A subset of isolates was subjected to whole-genome sequencing. The genetic basis of tigecycline resistance was assessed by ResFinder and by comparative analyses to known tetracycline and tigecycline resistance genes. Phylogenetic investigations revealed the clustering of 11 TVRE that exhibited genotype ST117/CT1489. Two tigecycline-susceptible isolates were unrelated. Characterization of the genetic determinant putatively responsible for tigecycline resistance revealed two chromosomal changes in the TVRE population: (1) a deletion within the ribosomal protein gene rpsJ and (2) a serine insertion in and removal of transcriptional regulation of the ribosomal protection protein Tet(M). We here report the first nosocomial cluster of TVRE in a German hospital and disclosed the resistance mechanism that was most likely causative for tigecycline insusceptibility. Clonal spread of TVRE isolates can be assumed because all isolates were highly related and harbored identical chromosomal alterations associated with tigecycline resistance.
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Affiliation(s)
- Jennifer K Bender
- Division of Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre (NRC) for Staphylococci and Enterococci, Robert Koch Institute, Wernigerode, Germany
| | - Ingo Klare
- Division of Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre (NRC) for Staphylococci and Enterococci, Robert Koch Institute, Wernigerode, Germany
| | - Carola Fleige
- Division of Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre (NRC) for Staphylococci and Enterococci, Robert Koch Institute, Wernigerode, Germany
| | - Guido Werner
- Division of Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre (NRC) for Staphylococci and Enterococci, Robert Koch Institute, Wernigerode, Germany
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Manson AL, Van Tyne D, Straub TJ, Clock S, Crupain M, Rangan U, Gilmore MS, Earl AM. Chicken Meat-Associated Enterococci: Influence of Agricultural Antibiotic Use and Connection to the Clinic. Appl Environ Microbiol 2019; 85:e01559-19. [PMID: 31471308 PMCID: PMC6821970 DOI: 10.1128/aem.01559-19] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 08/27/2019] [Indexed: 12/17/2022] Open
Abstract
Industrial farms are unique, human-created ecosystems that provide the perfect setting for the development and dissemination of antibiotic resistance. Agricultural antibiotic use amplifies naturally occurring resistance mechanisms from soil ecologies, promoting their spread and sharing with other bacteria, including those poised to become endemic within hospital environments. To better understand the role of enterococci in the movement of antibiotic resistance from farm to table to clinic, we characterized over 300 isolates of Enterococcus cultured from raw chicken meat purchased at U.S. supermarkets by the Consumers Union in 2013. Enterococcus faecalis and Enterococcus faecium were the predominant species found, and antimicrobial susceptibility testing uncovered striking levels of resistance to medically important antibiotic classes, particularly from classes approved by the FDA for use in animal production. While nearly all isolates were resistant to at least one drug, bacteria from meat labeled as raised without antibiotics had fewer resistances, particularly for E. faecium Whole-genome sequencing of 92 isolates revealed that both commensal- and clinical-isolate-like enterococcal strains were associated with chicken meat, including isolates bearing important resistance-conferring elements and virulence factors. The ability of enterococci to persist in the food system positions them as vehicles to move resistance genes from the industrial farm ecosystem into more human-proximal ecologies.IMPORTANCE Bacteria that contaminate food can serve as a conduit for moving drug resistance genes from farm to table to clinic. Our results show that chicken meat-associated isolates of Enterococcus are often multidrug resistant, closely related to pathogenic lineages, and harbor worrisome virulence factors. These drug-resistant agricultural isolates could thus represent important stepping stones in the evolution of enterococci into drug-resistant human pathogens. Although significant efforts have been made over the past few years to reduce the agricultural use of antibiotics, continued assessment of agricultural practices, including the roles of processing plants, shared breeding flocks, and probiotics as sources for resistance spread, is needed in order to slow the evolution of antibiotic resistance. Because antibiotic resistance is a global problem, global policies are needed to address this threat. Additional measures must be taken to mitigate the development and spread of antibiotic resistance elements from farms to clinics throughout the world.
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Affiliation(s)
- Abigail L Manson
- Infectious Disease and Microbiome Program, Genomic Center for Infectious Diseases, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Daria Van Tyne
- Infectious Disease and Microbiome Program, Genomic Center for Infectious Diseases, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Department of Ophthalmology, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
| | - Timothy J Straub
- Infectious Disease and Microbiome Program, Genomic Center for Infectious Diseases, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Sarah Clock
- Food Safety and Sustainability Center, Consumer Reports, Yonkers, New York, USA
| | - Michael Crupain
- Food Safety and Sustainability Center, Consumer Reports, Yonkers, New York, USA
| | - Urvashi Rangan
- Food Safety and Sustainability Center, Consumer Reports, Yonkers, New York, USA
| | - Michael S Gilmore
- Infectious Disease and Microbiome Program, Genomic Center for Infectious Diseases, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Department of Ophthalmology, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
| | - Ashlee M Earl
- Infectious Disease and Microbiome Program, Genomic Center for Infectious Diseases, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
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Correa-Martinez CL, Stollenwerk VB, Kossow A, Schaumburg F, Mellmann A, Kampmeier S. Risk Factors for Long-Term Vancomycin-Resistant Enterococci Persistence-A Prospective Longitudinal Study. Microorganisms 2019; 7:E400. [PMID: 31561632 PMCID: PMC6843193 DOI: 10.3390/microorganisms7100400] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/23/2019] [Accepted: 09/25/2019] [Indexed: 01/05/2023] Open
Abstract
Vancomycin-resistant enterococci (VRE) are important nosocomial pathogens that require effective infection control measures, representing a challenge for healthcare systems. This study aimed at identifying risk factors associated with prolonged VRE carriage and determining the rate of clearance that allows the discontinuation of contact precautions. During a 2-year study, screening was performed in patients with a history of VRE or at risk of becoming colonized. After bacterial identification and antibiotic susceptibility testing, glycopeptide resistance was confirmed by PCR. Isolates were compared via whole genome sequence-based typing. Risk factors were recorded, and follow-up screening was performed upon readmission, defining patients as long-term carriers if still colonized ≥10 weeks after first detection. Of 1059 patients positive for VRE, carriage status was assessed upon readmission in 463 patients. VRE was cleared in 56.4% of the cases. Risk factors associated with long-term persistence were hospital stays (frequency, length), hemato-oncological disease, systemic treatment with steroids, and use of antibiotics. No specific genotypic clustering was observed in patients with VRE clearance or persistence. VRE clearance is possibly underestimated. The identification of risk factors favoring long-term carriage may contribute to a targeted implementation of infection control measures upon readmission of patients with history of VRE.
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Affiliation(s)
- Carlos L Correa-Martinez
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149 Münster, Germany.
| | - Verena B Stollenwerk
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149 Münster, Germany.
| | - Annelene Kossow
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149 Münster, Germany.
| | - Frieder Schaumburg
- Institute of Medical Microbiology, University Hospital Münster, Domagkstraße 10, 48149 Münster, Germany.
| | - Alexander Mellmann
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149 Münster, Germany.
| | - Stefanie Kampmeier
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149 Münster, Germany.
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Shortridge D, Flamm RK. Comparative In Vitro Activities of New Antibiotics for the Treatment of Skin Infections. Clin Infect Dis 2019; 68:S200-S205. [PMID: 30957168 PMCID: PMC6451995 DOI: 10.1093/cid/ciz003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Bacterial skin infections result in significant morbidity and have contributed to enhanced health-care resource utilization. The problem is heightened by emerging antimicrobial resistance. Multiple novel agents active against resistant pathogens that cause skin infections-including dalbavancin, tedizolid phosphate, oritavancin, and delafloxacin-have been approved over the past 5 years. Common features of these agents include gram-positive activity and favorable safety. Of these agents, delafloxacin is unique in being active against both gram-positive and gram-negative pathogens that cause skin infections, including those resistant to other antimicrobial agents. It is, therefore, an effective option for the treatment of skin infections.
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