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Rapid differentiation of candida dubliniensis from candida albicans by early D-xylose assimilation
Medical Principles and Practice. 2012; 21 (4): 375-378
in English | IMEMR | ID: emr-124869
ABSTRACT
To determine if D-xylose [XYL] and/or alpha-methyl-D-glucoside [MDG] assimilation can be used reliably as a rapid test to differentiate Candida dubliniensis from Candida albicans at an earlier time point such as 2 h after inoculation. Thirty isolates of C. albicans and C. dubliniensis recovered from anatomical sites and clinical specimens were used. Isolates were inoculated into the API 20C AUX yeast identification system, and incubated at 30[degree sign]C. XYL and MDG assimilations were read at 2-hour intervals beginning 2 h after the initial inoculation and up to 24 h of incubation; thereafter, results were read after 48 and 72 h. Twenty-nine [97%] C. albicans isolates had assimilated XYL at 16 h and, by 24 h, all isolates were positive for XYL assimilation. None of the C. dubliniensis isolates assimilated XYL. The MDG assimilation revealed that 24, 40, 92 and 100% of C. albicans isolates became positive after 16, 24, 48 and 72 h of incubation, respectively, whereas only 3% of C. dubliniensis isolates assimilated MDG after 72 h. The findings showed that it is possible to rapidly differentiate C. albicans from C. dubliniensis isolates using the API 20C AUX carbohydrate assimilation kits after 16 h of incubation at 30[degree sign] C based on the XYL assimilation
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Index: IMEMR (Eastern Mediterranean) Main subject: Xylose / Candida albicans / Methylglucosides Language: English Journal: Med. Princ. Pract. Year: 2012

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Index: IMEMR (Eastern Mediterranean) Main subject: Xylose / Candida albicans / Methylglucosides Language: English Journal: Med. Princ. Pract. Year: 2012