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  • Title: Comparison of Vitek identification and antifungal susceptibility testing methods to DNA sequencing and Sensititre YeastOne antifungal testing.
    Author: Vijgen S, Nys S, Naesens R, Magerman K, Boel A, Cartuyvels R.
    Journal: Med Mycol; 2011 Jan; 49(1):107-10. PubMed ID: 20560861.
    Abstract:
    The colorimetric Vitek 2 YST card and the yeast susceptibility test (AST-YS01) were evaluated for their identification efficacy and their use in assessing the in vitro susceptibility of Candida spp. to fluconazole, voriconazole and amphotericin B. Ninety-one percent or 62 of 68 Candida isolates from blood specimens were correctly identified, as compared to determinations of the ITS2 fragment length. The overall essential agreements between Vitek 2 and the Sensititre YeastOne (SYO) colorimetric method were 78.4%, 84.6% and 90.8%, for fluconazole, voriconazole and amphotericin B, respectively. The overall categorical agreements between Vitek 2 and SYO for fluconazole and voriconazole were 76.9% and 96.9%, respectively. The poorest agreement between Vitek 2 and SYO was seen with C. glabrata (n = 27), particularly for fluconazole. The MIC values of 2 C. glabrata strains (3%) could not be determined with the Vitek 2 due to an insufficient growth in the control well. For other Candida species (n = 38) Vitek 2 and SYO showed acceptable agreements.
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