Virology USMLE Step 1 Practice Question
A 3-week-old infant presents with fever (38.9Ā°C), irritability, and poor feeding for 2 days. Vital signs show HR 160 bpm, RR 48/min, BP 65/40 mmHg, and SpO2 92% on room air. Physical examination reveals vesicular rash on the trunk and no meningeal signs. CSF analysis shows lymphocytic pleocytosis with normal glucose. The family practitioner is concerned because this virus causes severe disseminated disease and higher mortality in neonates compared to older children.
Answer choices
- AHepatitis B virusCorrect answer
- BMeasles virus
- CVaricella zoster virus
- DPoliovirus
- EEpstein-Barr virus
- FCytomegalovirus
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