Pathogenesis > Infectious Disease > Fungus > Alternaria

Phaeohyphomycoses

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•represent a broad spectrum of dematiaceous fungal infection
•but neither sclerotic bodies (chromomycosis) nor granules (mycetoma) are seen
•superficial phaeohyphomycoses – confined to stratum corneum
•black piedra – piedra hortae
•t. nigra – Pheoannellomyces Werneckii
•cutaneous phaeohyphomycoses – keratinized tissue e.g. alterneria alternaria culture = hand grenades onychomycosis
•subcutaneous phaeohyphomycoses – (phaeomycotic cyst – alterneria)  = traumatic implantation; often contain a peanut butter-like material