Rationale for Reading Fluconazole MICs at 24 Hours Rather than 48 Hours When Testing Candida spp. by the CLSI M27-A2 Standard Method

We investigated if CLSI M27-A2 Candida species breakpoints for fluconazole MIC are valid when read at 24 h. Analysis of a data set showed good correlation between 48- and 24-h MICs, as well as similar outcomes and pharmacodynamic efficacy parameters, except for isolates in the susceptible dose-dependent category, such as Candida glabrata.