Tinea nigra characteristics
-Etiology = Hortaea werneckii (also known as Exophiala werneckii) or Stenella araguata
-Distribution = warm climates, geophilic & anthropophilic, hyperhidrotics (excessive moisture), coastal states of the US.
-Exposure to soil, sewage, wood, compost
-Dimorphic fungus - produces melanin - brown to black color of organism
-Clinical Disease = usually asymptomatic; palmar (palm) and plantar (sole); neck and thorax Females > males, pediatric and adolescents
-Brown to black nonscaly, macular lesions