Mycology/Parasitology USMLE Step 1 Practice Question
A 35-year-old man from Ohio presents with fever (38.8°C), productive cough, and dyspnea after exploring a bat cave 3 weeks ago. Vital signs show HR 102/min, RR 22/min, SpO2 94% on room air. Chest X-ray reveals hilar lymphadenopathy with right upper lobe infiltrate. Sputum culture on Sabouraud agar at 25°C grows mold displaying tuberculate macroconidia. He denies hemoptysis. What is the most likely organism?
Answer choices
- ACryptococcus neoformans
- BHistoplasma capsulatumCorrect answer
- CAspergillus fumigatus
- DCoccidioides immitis
- EBlastomyces dermatitidis
- FPneumocystis jirovecii
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