Mycology/Parasitology USMLE Step 1 Practice Question
A 45-year-old man from the southwestern United States presents with fever, weight loss, and cough productive of blood. Chest X-ray reveals a solitary cavitary lesion in the right upper lobe. Sputum culture grows a dimorphic fungus that appears as small yeast in macrophages. Which of the following is the most likely causative organism?
Answer choices
- ABlastomyces dermatitidis
- BParacoccidioides brasiliensis
- CHistoplasma capsulatum
- DCoccidioides immitisCorrect answer
- ECryptococcus neoformans
- FAspergillus fumigatus
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