Viral Infections USMLE Step 1 Practice Question
A 52-year-old man with a history of injection drug use presents with a 3-week history of fatigue, palpable purpura on his lower extremities, and progressive numbness in his feet. Vital signs show BP 148/92 mmHg, HR 92 bpm, temperature 37.8°C. Laboratory studies reveal low complement levels, positive rheumatoid factor, elevated creatinine at 2.1 mg/dL, and negative HIV antibody. Kidney biopsy demonstrates membranoproliferative glomerulonephritis. Which organism is most likely responsible?
Answer choices
- AHuman immunodeficiency virus
- BCytomegalovirus
- CHepatitis C virusCorrect answer
- DTreponema pallidum
- EHepatitis B virus
- FMycobacterium tuberculosis
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