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  • Title: Single center experience of a vancomycin resistant enterococcal endocarditis cohort.
    Author: Forrest GN, Arnold RS, Gammie JS, Gilliam BL.
    Journal: J Infect; 2011 Dec; 63(6):420-8. PubMed ID: 21920382.
    Abstract:
    OBJECTIVES: Vancomycin resistant enterococcus (VRE) infective endocarditis (IE) is an increasing nosocomial problem. We describe the clinical management and outcomes of a cohort of patients with VRE IE at a tertiary endocarditis referral center. METHODS: Retrospective review of all proven cases of VRE IE, from July 2000 through January 2008 was performed. Demographics, comorbidities and therapeutic details were collected and analyzed to assess for risk factors and clinical outcomes. RESULTS: Fifty cases of VRE IE were identified: 26 (52%) were Enterococcus faecium and 24 were Enterococcus faecalis. Vancomycin resistant E. faecalis IE was associated with the presence of a central venous line, liver transplantation, and mitral valve infection while VR E. faecium IE was significantly associated with tricuspid valve infection (p=0.03). The median duration of bacteremia was 14 days for E. faecium and 4 days for E. faecalis, respectively (p=0.002). Factors associated with mortality on bivariate analysis were hemodialysis via a catheter with VR E. faecium (OR=11.7. CI 1.1-122, p=0.02) and liver transplantation with both species. Combination antimicrobial therapy (OR=0.5 CI=0.06-3.2, p=0.1) and valve surgery (OR 1.3 CI 0.8-20, p=0.02) trended toward improved survival with E. faecalis on bivariate analysis. On multivariate analysis, none of the associations were significant. CONCLUSIONS: Hemodialysis and liver transplantation were factors associated with acquisition of VRE IE. There was a higher mortality and prolonged bacteremia with VR E. faecium IE than VR E. faecalis IE. Although not significant, combination antimicrobial therapy and surgical intervention trended toward improved survival.
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