Bacteriology USMLE Step 1 Practice Question
A 34-year-old woman with a history of recent abortion presents with fever, chills, and abdominal pain. Blood cultures grow a gram-negative coccobacillus that requires special media and is a fastidious organism. Further testing shows the organism requires both factor X (hemin) and factor V (NAD). Which diagnosis is most likely?
Answer choices
- ANeisseria gonorrhoeae disseminated infection
- BLegionella pneumophila bacteremia
- CEscherichia coli urosepsis
- DVibrio vulnificus wound infection
- EHaemophilus influenzae sepsisCorrect answer
- FCampylobacter jejuni gastroenteritis with bacteremia
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