Bacteriology USMLE Step 1 Practice Question
A 58-year-old male with alcohol use disorder and multiple dental caries develops a pulmonary abscess (chest X-ray shows cavitary lesion with air-fluid level). He is started on clindamycin. Four days later, he presents with nausea, vomiting, and voluminous, profuse, green diarrhea. Vital signs: BP 118/76, HR 102, RR 18, Temp 38.2°C. Abdominal examination reveals diffuse tenderness without rebound. Stool culture is pending. Which antibiotic is most likely responsible for these symptoms?
Answer choices
- AVancomycin
- BChloramphenicol
- CClindamycinCorrect answer
- DMetronidazole
- EGentamicin
- FCeftriaxone
See the full explanation
Get the correct-answer rationale, why each distractor is wrong, the underlying mechanism, and high-yield associations — plus adaptive practice that targets your weak areas — with a free MedBoardPRO account.