Clostridium difficile infection is the most common cause of antibiotic-associated diarrhea. Treatment of this infection usually occurs using other antibiotics, but many individuals have persistent diarrhea and multiple relapses. Fecal Transplant (FMT), or Intestinal Microbiota Transplantation, (IMT) has been shown to be efficacious when administered after treatment for C. difficile. This study will involve taking biopsies from patients during their FMT/IMT via colonoscopy, and determine if there are differences in the mucosal flora as compared to the stool flora. The investigators hope to discover the critical parts of a healthy microbiota.