Multicenter study of anidulafungin and micafungin MIC distributions and epidemiological cutoff values for eight Candida species and the CLSI M27-A3 broth microdilution method

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dc.contributor.authorPfaller, M.
dc.contributor.authorEspinel-Ingroff, A.
dc.contributor.authorBustamante, B.
dc.contributor.authorCanton, E.
dc.contributor.authorDiekema, D.
dc.contributor.authorFothergill, A.
dc.contributor.authorFuller, J.
dc.contributor.authorGonzalez, G.
dc.contributor.authorGuarro, J.
dc.contributor.authorLass-Flörl, C.
dc.contributor.authorLockhart, S.
dc.contributor.authorMartin-Mazuelos, E.
dc.contributor.authorMeis, J.
dc.contributor.authorOstrosky-Zeichner, L.
dc.contributor.authorPelaez, T.
dc.contributor.authorSt-Germain, G.
dc.contributor.authorTurnidger, J.
dc.date.issued2014
dc.description.abstractSince 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.
dc.description.statementofresponsibilityM. 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
dc.identifier.citationAntimicrobial Agents and Chemotherapy, 2014; 58(2):916-922
dc.identifier.doi10.1128/AAC.02020-13
dc.identifier.issn1098-6596
dc.identifier.issn1098-6596
dc.identifier.urihttp://hdl.handle.net/2440/101885
dc.language.isoen
dc.publisherAmerican Society for Microbiology
dc.rightsCopyright © 2014, American Society for Microbiology. All Rights Reserved.
dc.source.urihttps://doi.org/10.1128/aac.02020-13
dc.subjectHumans
dc.subjectCandida
dc.subjectCandidiasis
dc.subjectFungal Proteins
dc.subjectAntifungal Agents
dc.subjectMicrobial Sensitivity Tests
dc.subjectGene Expression
dc.subjectMutation
dc.subjectNorth America
dc.subjectSouth America
dc.subjectEurope
dc.subjectEchinocandins
dc.subjectLipopeptides
dc.subjectMicafungin
dc.subjectAnidulafungin
dc.titleMulticenter study of anidulafungin and micafungin MIC distributions and epidemiological cutoff values for eight Candida species and the CLSI M27-A3 broth microdilution method
dc.typeJournal article
pubs.publication-statusPublished

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