Pneumonia USMLE Step 1 Practice Question
A 61-year-old male with poor dentition and alcohol use disorder presents with fever, copious foul-smelling sputum, and weight loss over 3 weeks. Vital signs show temperature 38.9°C, heart rate 102/min, respiratory rate 22/min, and oxygen saturation 94% on room air. Chest CT reveals a cavitary lesion with air-fluid level in the right upper lobe. Sputum culture grows anaerobic organisms. He denies recent aspiration events. Which of the following is the most likely diagnosis?
Answer choices
- AEmpyema
- BKlebsiella pneumoniae
- CLung abscessCorrect answer
- DTuberculosis
- EPulmonary embolism
- FBronchiectasis with superimposed infection
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