Observational study of the epidemiology and outcomes of vancomycin-resistant Enterococcus bacteraemia treated with newer antimicrobial agents

Epidemiol Infect. 2011 Sep;139(9):1342-50. doi: 10.1017/S0950268810002475. Epub 2010 Nov 15.

Abstract

Vancomycin-resistant Enterococcus bloodstream infections (VRE-BSI) are a growing problem with few clinical trials to guide therapy. We conducted a retrospective study of management and predictors of mortality for VRE-BSI at a tertiary-care centre from January 2005 to August 2008. Univariate and multivariable analyses examined the relationship of patient characteristics and antibiotic therapy with 30-day all-cause mortality. Rates of VRE-BSI increased from 0·06 to 0·17 infections/1000 patient-days (P=0·03). For 235 patients, 30-day mortality was 34·9%. Patients were primarily treated with linezolid (44·2%) or daptomycin (36·5%). Factors associated with mortality were haemodialysis [odds ratio (OR) 3·2, 95% confidence interval (CI) 1·6-6·3, P=0·007], mechanical ventilation (OR 3·7, 95% CI 1·3-10·4, P=0·01), and malnutrition (OR 2·0, 95% CI 1·0-4·0, P=0·046). Use of linezolid, but not daptomycin (P=0·052) showed a trend towards an association with survival. In conclusion, VRE-BSI is a growing problem, associated with significant 30-day mortality. Multiple factors were associated with poor outcomes at our hospital.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Acetamides / therapeutic use
  • Aged
  • Anti-Infective Agents / therapeutic use*
  • Bacteremia / drug therapy*
  • Bacteremia / microbiology
  • Bacteremia / mortality*
  • Daptomycin / therapeutic use
  • Enterococcus / drug effects
  • Enterococcus / isolation & purification*
  • Female
  • Gram-Positive Bacterial Infections / drug therapy*
  • Gram-Positive Bacterial Infections / microbiology
  • Gram-Positive Bacterial Infections / mortality
  • Humans
  • Linezolid
  • Male
  • Middle Aged
  • Oxazolidinones / therapeutic use
  • Retrospective Studies
  • Vancomycin Resistance*

Substances

  • Acetamides
  • Anti-Infective Agents
  • Oxazolidinones
  • Linezolid
  • Daptomycin