Comparative evaluation of ATB Fungus 2 and Sensititre YeastOne panels for testing in vitro Candida antifungal susceptibility

ATB Fungus 2 and Sensititre YeastOne are commercial methods for antifungal susceptibility testing of yeasts. The agreement between these two methods was assessed with a total of 133 Candida strains (60 Candida albicans, 18 Candida dubliniensis, 29 Candida glabrata, and 26 Candida krusel). MIC endpoints were established after 24 h of incubation at 36 +/- 1 degrees C by each method. Intra-laboratory reproducibility of both methods was excellent (>= 99%). Overall agreement between ATB Fungus 2 and Sensititre YeastOne 3 MICs (within 2 dilutions) was 91.2-97.7% for amphotericin B, 5-fluorocytosine and itraconazole, and 82.7% for fluconazole. The categorical agreement when ATB Fungus 2 results were compared to those by Sensititre YeastOne 3 was 93.2-98.5% for 5-fluorocytosine and amphotericin B, but lower for the triazoles (72.9-75.9%). This easy to perform method could be an alternative for routine use in the clinical microbiology laboratory for susceptibility testing of common Candida spp.