Impact of a formulary switch from ticarcillin-clavulanate to piperacillin-tazobactam on colonization with vancomycin-resistant enterococci

Lisa G. Winston, Edwin D. Charlebois, Szekim Pang, David R. Bangsberg, Francoise Perdreau-Remington, Henry F. Chambers

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

The prevalence of vancomycin-resistant enterococci (VRE) is increasing, despite infection control measures. Limited data link ticarcillin-clavulanate to higher VRE prevalence. Active surveillance for VRE was conducted before and after a formulary switch from ticarcillin-clavulanate to piperacillin- tazobactam. Rectal swabs were obtained serially in 863 adult patients admitted to intensive care units (ICUs) between November 1, 2000 and September 30, 2004. In the postswitch period, 38 of 497 (7.6%) patients acquired VRE versus 42 of 366 (11.5%) patients in the preswitch period. Survival analysis showed an overall hazard ratio (HR) of. 68 postswitch versus preswitch (P =. 07), with the greatest change in the surgical ICU (HR =. 17, P =. 006). Multivariate analysis showed an overall HR =. 51 (P =. 004). Hospital-wide, nonstool VRE clinical cultures fell from 39 (.58/1000 patient days) in the 10-month preswitch period to 27 (.33/1000 patient days) in the 12-month postswitch period. Infection control practices and use of other antibiotics remained stable. VRE acquisition appeared to decrease in association with a formulary change from ticarcillin-clavulanate to piperacillin-tazobactam.

Original languageEnglish (US)
Pages (from-to)462-469
Number of pages8
JournalAmerican Journal of Infection Control
Volume32
Issue number8
DOIs
StatePublished - Dec 1 2004
Externally publishedYes

ASJC Scopus subject areas

  • Epidemiology
  • Health Policy
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

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