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https://hdl.handle.net/2440/101885
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Type: | Journal article |
Title: | Multicenter study of anidulafungin and micafungin MIC distributions and epidemiological cutoff values for eight Candida species and the CLSI M27-A3 broth microdilution method |
Author: | Pfaller, M. Espinel-Ingroff, A. Bustamante, B. Canton, E. Diekema, D. Fothergill, A. Fuller, J. Gonzalez, G. Guarro, J. Lass-Flörl, C. Lockhart, S. Martin-Mazuelos, E. Meis, J. Ostrosky-Zeichner, L. Pelaez, T. St-Germain, G. Turnidger, J. |
Citation: | Antimicrobial Agents and Chemotherapy, 2014; 58(2):916-922 |
Publisher: | American Society for Microbiology |
Issue Date: | 2014 |
ISSN: | 1098-6596 1098-6596 |
Statement of Responsibility: | M. A. Pfaller, A. Espinel-Ingroff, B. Bustamante, E. Canton, D. J. Diekema, A. Fothergill, J. Fuller, G. M. Gonzalez, J. Guarro, C. Lass-Flörl, S. R. Lockhart, E. Martin-Mazuelos, J. F. Meis, L. Ostrosky-Zeichner, T. Pelaez, G. St-Germain, J. D. Turnidger |
Abstract: | Since epidemiological cutoff values (ECVs) using CLSI MICs from multiple laboratories are not available for Candida spp. and the echinocandins, we established ECVs for anidulafungin and micafungin on the basis of wild-type (WT) MIC distributions (for organisms in a species-drug combination with no detectable acquired resistance mechanisms) for 8,210 Candida albicans, 3,102 C. glabrata, 3,976 C. parapsilosis, 2,042 C. tropicalis, 617 C. krusei, 258 C. lusitaniae, 234 C. guilliermondii, and 131 C. dubliniensis isolates. CLSI broth microdilution MIC data gathered from 15 different laboratories in Canada, Europe, Mexico, Peru, and the United States were aggregated to statistically define ECVs. ECVs encompassing 97.5% of the statistically modeled population for anidulafungin and micafungin were, respectively, 0.12 and 0.03 μg/ml for C. albicans, 0.12 and 0.03 μg/ml for C. glabrata, 8 and 4 μg/ml for C. parapsilosis, 0.12 and 0.06 μg/ml for C. tropicalis, 0.25 and 0.25 μg/ml for C. krusei, 1 and 0.5 μg/ml for C. lusitaniae, 8 and 2 μg/ml for C. guilliermondii, and 0.12 and 0.12 μg/ml for C. dubliniensis. Previously reported single and multicenter ECVs defined in the present study were quite similar or within 1 2-fold dilution of each other. For a collection of 230 WT isolates (no fks mutations) and 51 isolates with fks mutations, the species-specific ECVs for anidulafungin and micafungin correctly classified 47 (92.2%) and 51 (100%) of the fks mutants, respectively, as non-WT strains. These ECVs may aid in detecting non-WT isolates with reduced susceptibility to anidulafungin and micafungin due to fks mutations. |
Keywords: | Humans Candida Candidiasis Fungal Proteins Antifungal Agents Microbial Sensitivity Tests Gene Expression Mutation North America South America Europe Echinocandins Lipopeptides Micafungin Anidulafungin |
Rights: | Copyright © 2014, American Society for Microbiology. All Rights Reserved. |
DOI: | 10.1128/AAC.02020-13 |
Published version: | http://dx.doi.org/10.1128/aac.02020-13 |
Appears in Collections: | Aurora harvest 3 Medicine publications |
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