Pneumonia USMLE Step 1 Practice Question
A 71-year-old nursing home resident found unresponsive after an overdose develops fever (38.9°C), productive cough, and dyspnea on hospital day 2. Vital signs show BP 118/76, HR 102, RR 22, SpO2 94% on room air. Chest radiograph reveals a cavitary infiltrate in the superior segment of the right lower lobe. WBC 13,200/μL. He denies recent antibiotic use. Which organism is most likely responsible for this infection?
Answer choices
- APrimary pulmonary hypertension due to BMPR2 mutation
- BPulmonary embolism
- CSpontaneous pneumothorax
- DStreptococcus pneumoniae
- ELung abscessCorrect answer
- FMycobacterium tuberculosis
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