Journal article
Multicenter study of anidulafungin and micafungin MIC distributions and epidemiological cutoff values for eight Candida species and the CLSI M27-A3 broth microdilution method
Antimicrobial agents and chemotherapy, Vol.58(2), pp.916-922
2014
DOI: 10.1128/AAC.02020-13
PMCID: PMC3910887
PMID: 24277027
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.
Details
- Title: Subtitle
- Multicenter study of anidulafungin and micafungin MIC distributions and epidemiological cutoff values for eight Candida species and the CLSI M27-A3 broth microdilution method
- Creators
- M A Pfaller - JMI Laboratories, North Liberty, Iowa, USAA Espinel-IngroffB BustamanteE CantonD J DiekemaA FothergillJ FullerG M Gonzalez - Universidad Autónoma de Nuevo LeónJ GuarroC Lass-FlörlS R LockhartE Martin-MazuelosJ F MeisL Ostrosky-ZeichnerT PelaezG St-GermainJ Turnidge
- Resource Type
- Journal article
- Publication Details
- Antimicrobial agents and chemotherapy, Vol.58(2), pp.916-922
- Publisher
- United States
- DOI
- 10.1128/AAC.02020-13
- PMID
- 24277027
- PMCID
- PMC3910887
- ISSN
- 1098-6596
- eISSN
- 1098-6596
- Language
- English
- Date published
- 2014
- Academic Unit
- Infectious Diseases; Epidemiology; Pathology; Internal Medicine
- Record Identifier
- 9983986265302771
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