Blas·to·my·ces .blas-tə-'mī-.sēz n a genus of yeastlike fungi that contains the causative agent (B. dermatitidis) of North American blastomycosis and that formerly included the causative agent (Paracoccidioides brasiliensis syn. B. brasiliensis) of South American blastomycosis
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Blas·to·my·ces (blas″to-miґsēz) [blasto- + Gr. mykēs fungus] a genus of thermal dimorphic Fungi Imperfecti of the form-class Hyphomycetes; species grow as mycelial forms at room temperature and as yeastlike forms at body temperature. It includes several yeasts that are pathogenic.Medical dictionary. 2011.