Mycology/Parasitology USMLE Step 1 Practice Question
A 40-year-old immunocompetent woman presents with a 3-week history of progressive nodular lymphangitis along her left arm following a gardening injury. She has a small, painless ulcer on her index finger. Vital signs: BP 118/76, HR 88, RR 16, Temp 37.2°C, SpO2 98%. Chest X-ray is normal. Culture on Sabouraud dextrose agar grows a dimorphic fungus that converts to yeast at 37°C. She denies antifungal therapy. Which organism is most likely?
Answer choices
- AChromoblastomycosis
- BCoccidioidomycosis
- CBlastomycosis
- DSporotrichosisCorrect answer
- ELeishmaniasis
- FHistoplasmosis
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