Journal
JOURNAL OF MEDICAL MICROBIOLOGY
Volume 63, Issue -, Pages 1638-1643Publisher
MICROBIOLOGY SOC
DOI: 10.1099/jmm.0.075507-0
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- Gilead Sciences, Milan, Italy
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We determined the in vitro antifungal activity of liposomal amphotericin B (L-AmB) against 604 clinical yeast isolates. Amphotericin B deoxycholate (D-AmB) was tested in parallel against all the isolates. Susceptibility testing was performed according to the Clinical and Laboratory Standards Institute (CLSI) M27-A3 method. Overall, L-AmB was highly active against the isolates (mean MIC, 0.42 mu g ml(-1); MIC90, 1 mu g ml(-1); 97.2% of MICs were <= 1 mu g ml(-1)) and comparable to D-AmB (mean MIC, 0.48 mu g ml(-1); MIC90, 1 mu g ml(-1); 97.3 % of MICs were <= 1 mu g ml(-1)). The in vitro activity of D-AmB and L-AmB was correlated (R-2=0.61; exp(b), 2.3; 95% CI, 2.19-2.44, P<0.001). Candida albicans (mean MICs of D-AmB and L-AmB, 0.39 mu g ml(-1) and 0.31 mu g ml(-1) respectively) and Candida parapsilosis (mean MICs of D-AmB and L-AmB, 0.38 mu g ml(-1) and 0.35 mu g ml(-1), respectively) were the species most susceptible to the agents tested, while Candida krusei (currently named Issatchenkia orientalis) (mean MICs of D-AmB and L-AmB, 1.27 mu g ml(-1) and 1.13 mu g ml(-1), respectively) was the least susceptible. The excellent in vitro activity of L-AmB may have important implications for empirical treatment approaches and support its role in treatment of a wide range of invasive infections due to yeasts.
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