Fungal and Parasitic Infections USMLE Step 1 Practice Question
A 39 year old man with untreated HIV presents with progressive dyspnea, dry cough, and fever. Oxygen saturation is 86 percent on room air. Chest radiograph shows bilateral diffuse interstitial infiltrates. Laboratory studies reveal elevated lactate dehydrogenase. Bronchoalveolar lavage with methenamine silver stain shows cup shaped cysts. Which of the following is the most likely diagnosis?
Answer choices
- ATuberculosis
- BLegionella pneumonia
- CPneumocystis jirovecii pneumoniaCorrect answer
- DCytomegalovirus pneumonia
- EHistoplasmosis
- FMycobacterium avium complex infection
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