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Moderatefidaxomicin (standard or extended-pulsed) is recommended over vancomycin due to lower recurrence; vancomycin taper/pulse is an alternative. Metronidazole (A) is not preferred. Probiotics (C) are not sufficient. IV vancomycin (D) and bacitracin (E) are not recommended."Infectious Diseases"moderate"

A 50-year-old with recent C. difficile infection completed vancomycin 125 mg QID ×10 days. Three weeks later, nonsevere recurrence occurs. Best therapy?

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