Pneumonia USMLE Step 1 Practice Question
A 28-year-old male spelunker from Ohio presents one week after exploring bat-infested caves with fever (38.9°C), productive cough, and pleuritic chest pain. Vital signs show BP 128/82, HR 102, RR 20, SpO2 94% on room air. Chest X-ray demonstrates patchy alveolar infiltrates with hilar lymphadenopathy. Laboratory studies reveal elevated transaminases (AST 78 U/L). He denies hemoptysis. Which organism most likely caused this infection?
Answer choices
- AHistoplasma capsulatumCorrect answer
- BCoccidioides immitis
- CTuberculosis
- DPneumocystis jirovecii pneumonia
- EBlastomyces dermatitidis
- FCryptococcus neoformans
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