Fungal and Parasitic Infections USMLE Step 1 Practice Question
A 35-year-old shepherd with chronic right upper quadrant pain presents with vital signs: BP 128/82, HR 88, RR 16, temp 37.2°C, SpO2 98% on room air. Ultrasound demonstrates a large cystic hepatic lesion with multiple daughter cysts and elevated liver enzymes (ALT 65 U/L). He reports close contact with sheep and dogs but denies recent travel outside his region. Abdominal examination reveals mild hepatomegaly without jaundice. Which organism most likely explains these findings?
Answer choices
- AEchinococcus granulosusCorrect answer
- BGiardia lamblia
- CEntamoeba histolytica
- DTrichinella spiralis
- EDiphyllobothrium latum
- FFasciola hepatica
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