A total of 20 subjects with at least one relapse of Clostridium difficile infection undergoing Intestinal Microbiota Transplantation via colonoscopy will be recruited in this study. The patients will produce a stool specimen at the time of colonoscopy and a biopsy will be obtained during the colonoscopy. At 2 weeks and 10 weeks, stool specimens and anoscopy will be collected to be tested for C. difficile polymerase chain reaction (PCR) and the fecal microbiota. Subjects will be referred from all locations of Emory Healthcare.