In vitro susceptibility of yeast isolates from the blood to fluconazole and amphotericin B.

221 yeast strains including 131 of Candida albicans, 21 of C. tropicals, 23 of C. parapsilosis, 19 of C. glabrata, 7 of C. guilliermondii, 6 of C. krusei and of other species were isolated from the blood. The activity of fluconazole and amphotericin B was investigated by means of a photometer-read broth microdilution method measuring the 30% inhibitory concentrations (IC30). The results of fluconazole showed a higher susceptibility of C. albicans compared to the other species. However, 6 (4.5%) resistant strains of C. albicans were found. Low sensitivity and resistance were evaluated for C. krusei and C. glabrata strains. All isolates showed susceptibility to amphotericin B.