Detection and Characterization of Heterogeneous Vancomycin-Intermediate Staphylococcus aureus Isolates in Canada: Results from the Canadian Nosocomial Infection Surveillance Program, 1995-2006 Journal Articles uri icon

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  • ABSTRACT We describe the epidemiology of heterogeneously resistant Staphylococcus aureus (hVISA) identified in Canadian hospitals between 1995 and 2006. hVISA isolates were confirmed by the population analysis profiling-area under the curve method. Only 25 hVISA isolates (1.3% of all isolates) were detected. hVISA isolates were more likely to have been health care associated (odds ratio [OR], 5.1; 95% confidence interval [CI], 1.9 to 14.2) and to have been recovered from patients hospitalized in central Canada (OR, 3.0; 95% CI, 1.2 to 7.4). There has been no evidence of vancomycin “MIC creep” in Canadian strains of methicillin (meticillin)-resistant S. aureus , and hVISA strains are currently uncommon.


  • Adam, Heather J
  • Louie, Lisa
  • Watt, Christine
  • Gravel, Denise
  • Bryce, Elizabeth
  • Loeb, Mark
  • Matlow, Anne
  • McGeer, Allison
  • Mulvey, Michael R
  • Simor, Andrew E

publication date

  • February 2010