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Gut Colonization with Vancomycin-resistant and Risk for Subsequent Enteric Infection

Overview
Journal Gut Pathog
Publisher Biomed Central
Specialty Gastroenterology
Date 2018 Jul 14
PMID 30002733
Citations 10
Authors
Affiliations
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Abstract

Background: Gut colonization with vancomycin-resistant (VRE) is associated with poor outcomes. This study evaluated the impact of VRE colonization on subsequent acquisition of enteric pathogens.

Methods: We performed a retrospective cohort study of adults admitted to an ICU from 2012 to 2017 who were screened for VRE colonization and subsequently underwent stool testing with a gastrointestinal pathogen PCR panel (GI PCR) with or without PCR testing for . Our primary outcome was the presence of any enteric pathogen. Cox proportional hazards modeling was used to adjust for factors associated with enteric infection.

Results: Of 761 patients who underwent VRE screening and subsequent GI PCR, 131 (17%) were colonized with VRE. Patients with VRE colonization were less likely to test positive on GI PCR compared to patients without VRE (9.2% vs 18%, p = 0.01); specifically for species (p = 0.03) and viral (p = 0.04) enteric infections. In 716 patients who underwent testing, there was a trend towards more infections in patients colonized with VRE (15% vs 10%, p = 0.11). On multivariable analysis, patients with VRE had a decreased risk of a positive GI PCR (aHR 0.47, 95% CI 0.25-0.88, p = 0.02) but not infection, effects which persisted during 5 years of follow-up. Among positive tests, there was a greater proportion of with VRE (57% vs 28%, p < 0.01).

Conclusions: VRE colonization was associated with a decreased risk of subsequent non- enteric infection. VRE domination of the gut microbiome may protect against acquisition of common enteric pathogens.

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