Defining the Role of the Environment in the Emergence and Persistence of vanA Vancomycin-Resistant Enterococcus (VRE) in an Intensive Care Unit: A Molecular Epidemiological Study

OBJECTIVETo describe the transmission dynamics of the emergence and persistence of vanA vancomycin-resistant enterococcus (VRE) in an intensive care unit (ICU) using whole-genome sequencing of patient and environmental isolates.DESIGNRetrospective cohort study.SETTINGICU in a tertiary referral cente...

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Veröffentlicht in:Infection control and hospital epidemiology 2018-06, Vol.39 (6), p.668-675
Hauptverfasser: Lee, Andie S, White, Elizabeth, Monahan, Leigh G, Jensen, Slade O, Chan, Raymond, van Hal, Sebastiaan J
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container_end_page 675
container_issue 6
container_start_page 668
container_title Infection control and hospital epidemiology
container_volume 39
creator Lee, Andie S
White, Elizabeth
Monahan, Leigh G
Jensen, Slade O
Chan, Raymond
van Hal, Sebastiaan J
description OBJECTIVETo describe the transmission dynamics of the emergence and persistence of vanA vancomycin-resistant enterococcus (VRE) in an intensive care unit (ICU) using whole-genome sequencing of patient and environmental isolates.DESIGNRetrospective cohort study.SETTINGICU in a tertiary referral center.PARTICIPANTSPatients admitted to the ICU over an 11-month period.METHODS VanA VRE isolated from patients (n=31) were sequenced using the Illumina MiSeq platform. Environmental samples from bed spaces, equipment, and waste rooms were collected. All vanA VRE-positive environmental samples (n=14) were also sequenced. Data were collected regarding patient ward and bed movements.RESULTSThe 31 patient vanA VRE isolates were from screening (n=19), urine (n=4), bloodstream (n=3), skin/wound (n=3), and intra-abdominal (n=2) sources. The phylogeny from sequencing data confirmed several VRE clusters, with 1 group accounting for 38 of 45 isolates (84%). Within this cluster, cross-transmission was extensive and complex across the ICU. Directionality indicated that colonized patients contaminated environmental sites. Similarly, environmental sources not only led to patient colonization but also to infection. Notably, shared equipment acted as a conduit for transmission between different ICU areas. Infected patients, however, were not linked to further VRE transmission.CONCLUSIONSGenomic sequencing confirmed a predominantly clonal outbreak of VRE with complex transmission dynamics. The environmental reservoir, particularly from shared equipment, played a key role in ongoing VRE spread. This study provides evidence to support the use of multifaceted strategies, with an emphasis on measures to reduce bacterial burden in the environment, for successful VRE control.Infect Control Hosp Epidemiol 2018;39:668-675.
doi_str_mv 10.1017/ice.2018.29
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Environmental samples from bed spaces, equipment, and waste rooms were collected. All vanA VRE-positive environmental samples (n=14) were also sequenced. Data were collected regarding patient ward and bed movements.RESULTSThe 31 patient vanA VRE isolates were from screening (n=19), urine (n=4), bloodstream (n=3), skin/wound (n=3), and intra-abdominal (n=2) sources. The phylogeny from sequencing data confirmed several VRE clusters, with 1 group accounting for 38 of 45 isolates (84%). Within this cluster, cross-transmission was extensive and complex across the ICU. Directionality indicated that colonized patients contaminated environmental sites. Similarly, environmental sources not only led to patient colonization but also to infection. Notably, shared equipment acted as a conduit for transmission between different ICU areas. Infected patients, however, were not linked to further VRE transmission.CONCLUSIONSGenomic sequencing confirmed a predominantly clonal outbreak of VRE with complex transmission dynamics. The environmental reservoir, particularly from shared equipment, played a key role in ongoing VRE spread. This study provides evidence to support the use of multifaceted strategies, with an emphasis on measures to reduce bacterial burden in the environment, for successful VRE control.Infect Control Hosp Epidemiol 2018;39:668-675.</description><identifier>ISSN: 0899-823X</identifier><identifier>EISSN: 1559-6834</identifier><identifier>DOI: 10.1017/ice.2018.29</identifier><identifier>PMID: 29611491</identifier><language>eng</language><publisher>United States: Cambridge University Press</publisher><subject>Antibiotic resistance ; Antibiotics ; Electrocardiography ; Gastroenterology ; Gastrointestinal surgery ; Genomes ; Hematology ; Hepatology ; Hygiene ; Intensive care ; Nursing ; Patients ; Phylogeny ; Software ; Staphylococcus infections</subject><ispartof>Infection control and hospital epidemiology, 2018-06, Vol.39 (6), p.668-675</ispartof><rights>2018 by The Society for Healthcare Epidemiology of America. 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Environmental samples from bed spaces, equipment, and waste rooms were collected. All vanA VRE-positive environmental samples (n=14) were also sequenced. Data were collected regarding patient ward and bed movements.RESULTSThe 31 patient vanA VRE isolates were from screening (n=19), urine (n=4), bloodstream (n=3), skin/wound (n=3), and intra-abdominal (n=2) sources. The phylogeny from sequencing data confirmed several VRE clusters, with 1 group accounting for 38 of 45 isolates (84%). Within this cluster, cross-transmission was extensive and complex across the ICU. Directionality indicated that colonized patients contaminated environmental sites. Similarly, environmental sources not only led to patient colonization but also to infection. Notably, shared equipment acted as a conduit for transmission between different ICU areas. Infected patients, however, were not linked to further VRE transmission.CONCLUSIONSGenomic sequencing confirmed a predominantly clonal outbreak of VRE with complex transmission dynamics. The environmental reservoir, particularly from shared equipment, played a key role in ongoing VRE spread. 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Infected patients, however, were not linked to further VRE transmission.CONCLUSIONSGenomic sequencing confirmed a predominantly clonal outbreak of VRE with complex transmission dynamics. The environmental reservoir, particularly from shared equipment, played a key role in ongoing VRE spread. This study provides evidence to support the use of multifaceted strategies, with an emphasis on measures to reduce bacterial burden in the environment, for successful VRE control.Infect Control Hosp Epidemiol 2018;39:668-675.</abstract><cop>United States</cop><pub>Cambridge University Press</pub><pmid>29611491</pmid><doi>10.1017/ice.2018.29</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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subjects Antibiotic resistance
Antibiotics
Electrocardiography
Gastroenterology
Gastrointestinal surgery
Genomes
Hematology
Hepatology
Hygiene
Intensive care
Nursing
Patients
Phylogeny
Software
Staphylococcus infections
title Defining the Role of the Environment in the Emergence and Persistence of vanA Vancomycin-Resistant Enterococcus (VRE) in an Intensive Care Unit: A Molecular Epidemiological Study
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