Viral Infections USMLE Step 1 Practice Question
A 45-year-old man from Southeast Asia presents with fever, severe headache, neck stiffness, and photophobia for 4 days. CSF shows lymphocytic pleocytosis (180 WBC, 70% lymphocytes), elevated protein (150 mg/dL), and normal glucose. PCR for HSV is negative. Which of the following is most likely to be identified on serology or tissue culture?
Answer choices
- ADengue virus
- BWest Nile virus
- CEnterovirus 71
- DZika virus
- EJapanese encephalitis virusCorrect answer
- FChikungunya virus
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