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Antimicrob Agents Chemother. 2014 Jul;58(7):3814-9. doi: 10.1128/AAC.01035-13. Epub 2014 Apr 21.

Antifungal susceptibilities of Candida isolates causing bloodstream infections at a medical center in Taiwan, 2009-2010.

Author information

1
Department of Internal Medicine, Far Eastern Memorial Hospital, Taipei, Taiwan Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
2
Department of Internal Medicine, Far Eastern Memorial Hospital, Taipei, Taiwan.
3
Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
4
Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
5
Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan hsporen@ntu.edu.tw.

Abstract

We used the Sensititre YeastOne (SYO) method (Trek Diagnostic Systems) to determine the MICs of nine antifungal agents against 474 nonduplicate blood Candida isolates. The MIC results were interpreted according to updated clinical breakpoints (CBPs) recommended by the Clinical and Laboratory Standards Institute (CLSI; document M27-S4) or epidemiology cutoff values (ECVs). The rates of fluconazole susceptibility were 99.2% (234/236) in Candida albicans, 86.7% (85/98) in C. tropicalis, and 97.7% (42/43) in C. parapsilosis. Among the 77 isolates of C. glabrata, 90.9% showed dose-dependent susceptibility (S-DD) to fluconazole. Nearly all isolates of C. albicans, C. parapsilosis, and C. krusei were susceptible to voriconazole; however, rates of voriconazole susceptibility were 78.6% in C. tropicalis. Few isolates of C. albicans (n = 5; 2.1%) and C. glabrata (n = 3; 3.9%), no isolates of C. parapsilosis, C. krusei, and C. guilliermondii, but 62.2% (n = 51) of C. tropicalis isolates were non-wild type for posaconazole susceptibility. For itraconazole susceptibility, 98.3% of C. albicans isolates were wild type, and 3.9% (n = 3) of C. glabrata isolates were non-wild type. Almost all of the isolates tested (>97% for all species) were susceptible to both micafungin and anidulafungin. All isolates tested were found to be wild type for amphotericin B susceptibility, with MICs of <1 μg/ml. Further evaluation is needed to establish CBPs of antifungal agents by the 24-h SYO method for the management of patients with candidemia or other invasive candida infections.

PMID:
24752274
PMCID:
PMC4068559
DOI:
10.1128/AAC.01035-13
[Indexed for MEDLINE]
Free PMC Article
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