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Medical Definition of Paracoccidioides brasiliensis
1. A dimorphic fungus that causes paracoccidioidomycosis. In tissues and on enriched culture medium at 37°C, it grows as large spherical or oval cells which bear single or several buds, and usually is identified by this characteristic; at lower temperatures, it grows slowly as a white mold with minimal sporulation and is noncharacteristic. (05 Mar 2000)