Dimorphic Fungi (yeasts at 37ºC / moulds at 22ºC)

on 16.5.08 with 0 comments



Dimorphic fungi, as the name suggests, can be yeasts of moulds depending on the incubation temperation. Examples include: Cladosporium sp., Sporothrix schenckii  Sporotrichosis. Histoplasma capsulatum: causes histoplasmosis, diagnosis: perform biopsy, culture on Sabornauds at above temps to see which determines growth ==> Treatment is Amp B. Blastomyces dermatitidis – North American blastomycosis is another example, Coccidioides immitis – cause of Coccidiodomycosis.


Diagnosis of dimorphic fungi is by performing a biopsy – if yeasts, but this of little value. Culture at 22ºC & 37ºC to see what category it falls into, allows specific identification, treatment is most often by Amp B.

Category: Microbiology Notes

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