Bacterial Infections USMLE Step 1 Practice Question
An 8 year old boy is brought to the emergency department for fatigue and decreased urination. Three days ago he developed severe abdominal cramps and bloody diarrhea after eating undercooked hamburgers at a fair. He is afebrile. Laboratory studies show hemoglobin 8.7 g per dL, platelets 62,000 per mm3, and creatinine 2.1 mg per dL. Which of the following is the most likely causal organism?
Answer choices
- ASalmonella typhi
- BEnterotoxigenic Escherichia coli
- CVibrio cholerae
- DShigella dysenteriae
- EEnterohemorrhagic Escherichia coliCorrect answer
- FCampylobacter jejuni
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