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Prevalence and risk factors for VRE colonisation in a tertiary hospital in Melbourne, Australia: a cross sectional study

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Author(s): Karki Surendra | Houston Leanne | Land Gillian | Bass Pauline | Kehoe Rosaleen | Borrell Sue | Watson Kerrie | Spelman Denis | Kennon Jacqueline | Harrington Glenys | Cheng Allen C

Journal: Antimicrobial Resistance and Infection Control
ISSN 2047-2994

Volume: 1;
Issue: 1;
Start page: 31;
Date: 2012;
Original page

Keywords: VRE | Colonisation | Acquisition | Prevalence | Risk factors | Australia | VanB | Antibiotics

ABSTRACT
Abstract Background Vancomycin-resistant Enterococcus (VRE) has been established as a significant health-care associated problem since its first isolation in Australia in 1994. In this study, we measured the point prevalence and identified risk factors associated with vanB VRE colonisation in a tertiary care hospital in Melbourne, Australia where VRE has been endemic for 15 years. Methods A hospital-wide point prevalence survey was conducted on October 13, 2008 with colonisation detected using rectal swab culture. Patient’s demographic and medical information was collected through a review of medical records. Factors associated with VRE colonisation in univariate analysis were included in multivariate logistic regression model to adjust for confounding. Results The prevalence of VRE colonisation on the day of screening was 17.5% (95% CI, 13.7 to 21.9). VRE was detected from patients in each ward with the prevalence ranging from 3% to 29%. Univariate analysis showed the use of any antibiotic, meropenem, ciprofloxacin, diarrhoea and longer length of hospital stay were associated with increased risk of VRE colonisation (p0.05). Multivariate analysis showed the exposure to meropenem (p=0.004), age (≥65 years) (p=0.036) and length of stay ≥7 days (p

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