An immunocompromised patient from the mid-west became severe…

An immunocompromised patient from the mid-west became severely anemic.  A bone marrow sample showed macrophages with numerous small oval yeast cells inside.  Lung tissue biopsy also showed alveolar macrophages with intracellular budding yeast.  Similar organisms were seen in biopsy samples of the spleen and liver.  The fungal culture demonstrated large macroconidia with finger-like projections and some small, oval microconidia.  The most likely organism involved is:

A gardener develops a brown patch of skin in the center of t…

A gardener develops a brown patch of skin in the center of the palms of his hands.  He has treated them with a variety of over the counter medicine but it does not go away.  When the itching becomes worse he seeks medical advice.  He is diagnosed with tinea nigra.  What is the causative agent of this infection?

Several children at a summer camp have lesions on their feet…

Several children at a summer camp have lesions on their feet along with infected toenails.  The organism has an olive/brown surface with a yellow periphery and a pale yellow reverse. Microscopically, smooth 2-4 celled club-shaped macroconidia and no microconidia are observed. This organism is most likely:

A culture from a chronic interdigital lesion of the foot gre…

A culture from a chronic interdigital lesion of the foot grew a mold that is yellow to buff on the surface with a red-brown reverse, rare pencil-shaped macroconidia, and numerous microconidia in grapelike clusters with some spiraling hyphae also observed.  The organism is also positive for both urease and in-vitro hair perforation.  This organism is most likely: