Title
Multilaboratory study of epidemiological cutoff values for detection of resistance in eight Candida species to fluconazole, posaconazole, and voriconazole
Date Issued
01 January 2014
Access level
open access
Resource Type
journal article
Author(s)
Espinel-Ingroff A.
Pfaller M.A.
Canton E.
Fothergill A.
Fuller J.
Gonzalez G.M.
Lass-Flörl C.
Lockhart S.R.
Martin-Mazuelos E.
Meis J.F.
Melhem M.S.C.
Ostrosky-Zeichner L.
Pelaez T.
Szeszs M.W.
St-Germain G.
Bonfietti L.X.
Guarro J.
Turnidge J.
Publisher(s)
American Society for Microbiology
Abstract
Although epidemiological cutoff values (ECVs) have been established for Candida spp. and the triazoles, they are based on MIC data from a single laboratory. We have established ECVs for eight Candida species and fluconazole, posaconazole, and voriconazole based on wild-type (WT) MIC distributions for isolates of C. albicans (n = 11,241 isolates), C. glabrata (7,538), C. parapsilosis (6,023), C. tropicalis (3,748), C. krusei (1,073), C. lusitaniae (574), C. guilliermondii (373), and C. dubliniensis (162). The 24-h CLSI broth microdilution MICs were collated from multiple laboratories (in Canada, Brazil, Europe, Mexico, Peru, and the United States). The ECVs for distributions originating from ≥6 laboratories, which included ≥95% of the modeled WT population, for fluconazole, posaconazole, and voriconazole were, respectively, 0.5, 0.06 and 0.03 μg/ml for C. albicans, 0.5, 0.25, and 0.03 μg/ml for C. dubliniensis, 8, 1, and 0.25 μg/ml for C. glabrata, 8, 0.5, and 0.12 μg/ml for C. guilliermondii, 32, 0.5, and 0.25 μg/ml for C. krusei, 1, 0.06, and 0.06 μg/ml for C. lusitaniae, 1, 0.25, and 0.03 μg/ml for C. parapsilosis, and 1, 0.12, and 0.06 μg/ml for C. tropicalis. The low number of MICs (<100) for other less prevalent species (C. famata, C. kefyr, C. orthopsilosis, C. rugosa) precluded ECV definition, but their MIC distributions are documented. Evaluation of our ECVs for some species/agent combinations using published individual MICs for 136 isolates (harboring mutations in or upregulation of ERG11, MDR1, CDR1, or CDR2) and 64 WT isolates indicated that our ECVs may be useful in distinguishing WT from non-WT isolates. Copyright © 2014, American Society for Microbiology. All Rights Reserved.
Start page
2006
End page
2012
Volume
58
Issue
4
Language
English
OCDE Knowledge area
Enfermedades infecciosas Epidemiología
Scopus EID
2-s2.0-84896913990
PubMed ID
Source
Antimicrobial Agents and Chemotherapy
ISSN of the container
0066-4804
Sponsor(s)
Pfizer
Sources of information: Directorio de Producción Científica Scopus