Journal
MICROBIOLOGY AND IMMUNOLOGY
Volume 49, Issue 2, Pages 97-106Publisher
WILEY
DOI: 10.1111/j.1348-0421.2005.tb03707.x
Keywords
multicenter evaluation; broth microdilution antifungal susceptibility testing for yeast; MIC; commercial frozen plate
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A commercial kit, Frozen Plate for Antifungal Susceptibility Testing of Yeasts, Eiken (Eiken Chemical Co., Ltd., Tokyo), was tested in a multi-institute study to evaluate the agreement between inter-institute MICs and National Committee for Clinical Laboratory Standards (NCCLS) M27-A2 recommendation limits of MIC value. The kit was reported as a method equivalent to the standardized guidelines for antifungal susceptibility testing by the Committee for Clinical Laboratory Standards-1994, the Japanese Society for Medical Mycology, and which is widely used in Japan for amphotericin B, flucytosine, fluconazole, miconazole, and itraconazole. The degrees of inter-institute and NCCLS agreements were good to excellent especially with 48-hr incubation for all antifungal agents. However, the percent agreements to NCCLS recommendations against itraconazole were poor. Overall, MIC values obtained using the frozen plate antifungal susceptibility testing kit, with 48-hr incubation, were thought to be reliable and convenient alternatives to the data obtained by the NCCLS M27-A2 reference macrodilution and microdilution method. This kit will allow matching of results between international laboratories. However, the MIC value for itraconazole requires careful interpretation.
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