By Disease Name > Piedra

Piedra

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Black Piedra

•organism = piedraia hortie
•stone-like concretions on hair shaft
•culture = pigmented colonies (dermatiaceous)
•see Phaeohyphomycoses

 

White Piedra

•oranism = trichosporan begelli (not dermatiaceous)
•axillary and pubic hair
•treatment = shave the hair (+/- PO ketoconazole)

 

 

 

ddx: Trichomycosis axillaris – mimics piedras but not a fungus (corynebacterium tenus:  gram (+) rods)