Transient flare of ulcerative colitis after fecal microbiota transplantation for recurrent Clostridium difficile infection.

Clostridium difficile infection (CDI) is a common cause of infectious diarrhea and is usually treated with metronidazole or vancomycin. CDI recurs in 15%-30% of patients after the initial episode and in up to 65% after a second episode. Recurrent infections are a challenge to treat, and patients are usually managed with prolonged pulsed or tapered vancomycin. Fecal microbiota transplantation is an alternative treatment that has a 91% rate of success worldwide, with no reported complications. We describe a patient with ulcerative colitis that had been quiescent for more than 20 years who developed a flare of ulcerative colitis after fecal microbiota transplantation, indicating the need for caution in treating CDI with fecal microbiota transplantation in patients with inflammatory bowel disease.