Mycology/Parasitology USMLE Step 1 Practice Question
A 28-year-old man from the Mississippi River valley presents with fever, cough, and progressive pulmonary infiltrates. Blood cultures and sputum cultures grow a dimorphic fungus that appears as small yeast cells in macrophages at body temperature but as mold with tuberculate spores in culture at room temperature. Which of the following is the most likely organism?
Answer choices
- AAspergillus fumigatus
- BCryptococcus neoformans
- CBlastomyces dermatitidis
- DHistoplasma capsulatumCorrect answer
- ECoccidioides immitis
- FParacoccidioides brasiliensis
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