A graduate student returning from a month-long fieldwork experience in South America develops a dark nodular lesion on his left hand.Microscopic examination of the nodule reveals dark, coinlike inclusions.The following organism grows in culture.This organism is most likely:

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An infrequent cause of disease, Cladosporium is primarily recovered as a laboratory contaminant.Infections are typically confined to the sinuses or following traumatic inoculation.Cladosporium forms brown, to olive, to black hyphae and conidia.Conidiophores are erect and may branch into several conidiogenous cells.This disease is diagnosed by the presence of characteristic lesions accompanied by microscopic sclerotic bodies, often referred to as copper pennies because of their shape and staining properties in tissue sections.CDC PHIL #3214

A Graduate Student Returning from a Month-Long Fieldwork Experience in South