Mycology/Parasitology USMLE Step 1 Practice Question
A 45-year-old man presents with severe pruritus and maceration between his toes for 3 weeks. He works construction in occlusive boots 10 hours daily. Vital signs: BP 128/82, HR 88, RR 16, Temp 37.1°C, SpO2 98%. KOH preparation of skin scrapings reveals septate hyphae with acute angle branching. Fungal culture pending. He denies systemic symptoms, fever, or lymphadenopathy. Takes no antifungal medications. Which organism is most likely responsible?
Answer choices
- ATrichophyton rubrumCorrect answer
- BScopulariopsis brevicaulis
- CMicrosporum canis
- DMalassezia furfur
- ECandida albicans
- FEpidermophyton floccosum
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