Bacterial Infections USMLE Step 1 Practice Question
A 48-year-old homeless man presents with recurring fevers (38.9°C), headache, and shin pain for 2 weeks. Vital signs show BP 128/82, HR 102, RR 18, SpO2 98%. He reports poor hygiene and multiple pruritic excoriations on his trunk. Examination reveals body lice in clothing seams. Labs show WBC 11,200/μL with left shift. He denies rash or joint pain. Which organism most likely causes his symptoms?
Answer choices
- ARickettsia prowazekii
- BCoxiella burnetii
- CTreponema pallidum
- DBartonella quintanaCorrect answer
- EBartonella henselae
- FBorrelia recurrentis
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