COPD USMLE Step 1 Practice Question
A 29-year-old man presents with a 2-week productive cough, fever to 38.5°C, and dyspnea after cleaning an abandoned chicken coop in the Ohio River Valley. Vital signs show HR 102/min, RR 22/min, BP 128/76 mmHg, SpO2 92% on room air. Chest X-ray reveals patchy infiltrates and hilar lymphadenopathy. Tuberculin skin test is negative. He denies antibiotic use. Which organism most likely explains his clinical presentation?
Answer choices
- ACoccidioides immitis
- BPneumocystis jirovecii
- CBlastomyces dermatitidis
- DHistoplasma capsulatumCorrect answer
- ECryptococcus neoformans
- FAspergillus fumigatus
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