Fungal and Parasitic Infections USMLE Step 1 Practice Question
A 72-year-old man from Thailand presents to the clinic with a 6-week history of progressive dyspnea, productive cough with rust-colored sputum, and low-grade fever. He reports frequent consumption of undercooked freshwater crustaceans. On examination, temperature is 38.2°C, respiratory rate is 24/min, and oxygen saturation is 87% on room air. Chest X-ray shows a cavitary lesion in the right upper lobe with surrounding infiltrates. Laboratory studies reveal WBC 7,500/μL with eosinophilia at 8%. Sputum culture for bacteria is negative. Which of the following parasitic infections best explains this clinical presentation?
Answer choices
- AClonorchis sinensis infection
- BOpisthorchis viverrini infection
- CParagonimus westermani infectionCorrect answer
- DEchinococcus granulosus infection
- EStrongyloides stercoralis infection
- FAscaris lumbricoides infection
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