Correlation between E-test, disk diffusion, and microdilution methods for antifungal susceptibility testing of fluconazole and voriconazole

Antimicrob Agents Chemother. 2003 May;47(5):1647-51. doi: 10.1128/AAC.47.5.1647-1651.2003.

Abstract

The activities of fluconazole and voriconazole against isolates of Candida spp. (n = 400) were tested by the E-test, disk diffusion, and the National Committee for Clinical Laboratory Standards (NCCLS) M27-A2 broth microdilution-based reference methods. More than 96% of isolates found to be susceptible to fluconazole by the reference method were identified as susceptible by the agar-based methods. Lesser degrees of correlation with the reference method were seen for isolates identified as resistant by the agar-based methods. Interpretive categories are not available for voriconazole, but results qualitatively similar to those for fluconazole were seen. The agar-based E-test and disk diffusion methods are reliable alternatives to the NCCLS M27-A2 reference microdilution method for isolates that test susceptible to fluconazole.

Publication types

  • Comparative Study

MeSH terms

  • Antifungal Agents / pharmacology*
  • Candida / drug effects*
  • Diffusion
  • Fluconazole / pharmacology*
  • Microbial Sensitivity Tests / methods*
  • Pyrimidines / pharmacology*
  • Triazoles / pharmacology*
  • Voriconazole

Substances

  • Antifungal Agents
  • Pyrimidines
  • Triazoles
  • Fluconazole
  • Voriconazole