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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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An HIV positive female has an indurated ulcer over the tongue. Laboratory findings show growth in cornmeal agar at 20 degrees, microscopy showing hyphae and growth inhuman serum at 37 degrees show budding yeasts. The probable cause is:
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The correct answer is  Ans. (a) Candida albicans Ref. Harrison 19/e, p 1342, 18/e, p 1652 "This is a case of oral thrush secondary to candidiasis" C. albicans is a dimorphic fungi which occur both as yeast and moulds (with hyphae). In HIV oral thrush occurs when CD4 <50/1.11.