The term Dimorphic fungus has been employed to potential pathogens that
grow as mycelial form when incubated at room temperature under laboratory
conditions and yeast phase, yeast like cells or spherule form when grown
in human tissue or incubated at 37ºC on synthetic laboratory media.
Highly virulent dimorphic fungi are: Histoplasma capsulatum var.
capsulatum, Histoplasma capsulatum var. duboisii, Blastomyces dermatitidis,
Paracoccidioides brasiliensis, Sporothrix schenckii, Penicillium marneffei
and Coccidioides immitis.
Dimorphic fungi cause systemic mycosis often termed as histoplasmosis,
blastomycosis, paracoccidioidomycosis, sporotrichosis, penicilliosis
marneffei and coccidioidomycosis.