Accuracy of the VITEK 2 system to detect glycopeptide resistance in enterococci

J Clin Microbiol. 2001 Jan;39(1):351-3. doi: 10.1128/JCM.39.1.351-353.2001.

Abstract

We evaluated the accuracy of the VITEK 2 fully automated system to detect and identify glycopeptide-resistant enterococci (GRE) compared to a reference agar dilution method. The sensitivity of vancomycin susceptibility testing with VITEK 2 for the detection of vanA, vanB, and vanC1 strains was 100%. The sensitivity of vancomycin susceptibility testing of vanC2 strains was 77%. The sensitivity of teicoplanin susceptibility testing of vanA strains was 90%. Of 80 vanC enterococci, 78 (98%) were correctly identified by VITEK 2 as Enterococcus gallinarum/Enterococcus casseliflavus. Since the identification and susceptibility data are produced within 3 and 8 h, respectively, VITEK 2 appears a fast and reliable method for detection of GRE in microbiology laboratories.

Publication types

  • Evaluation Study

MeSH terms

  • Anti-Bacterial Agents / pharmacology*
  • Bacterial Proteins / genetics
  • Drug Resistance, Microbial / genetics
  • Enterococcus / drug effects*
  • Enterococcus / genetics
  • Gram-Positive Bacterial Infections / microbiology*
  • Humans
  • Microbial Sensitivity Tests / methods*
  • Sensitivity and Specificity
  • Teicoplanin / pharmacology*
  • Transferases
  • Vancomycin / pharmacology*
  • Vancomycin Resistance / genetics

Substances

  • Anti-Bacterial Agents
  • Bacterial Proteins
  • Teicoplanin
  • Vancomycin
  • Transferases
  • 3-deoxy-D-manno-octulosonate transferase