Fecal Microbiota Transplantation (FMT) for Recurrent/Refractory Clostridium difficile Infection (CDI) in Pediatric Immunocompromised Patients: A Single-center Experience

BACKGROUND: CDI is a common cause of bacterial diarrhea, especially in immunocompromised patients. Fecal Microbiota Transplanation (FMT) has been shown to be an effective treatment for recurrent and refractory CDI. The outcomes of FMT treatment for recurrent CDI have been well described in adult populations; however, the data for immunocompromised (IC) patients especially among children are limited. We describe the experience of FMT for treatment of CDI in immuncompromised pediatric patients. METHODS: We collected clinical data for IC patients <21 years in our pediatric institution who had received FMT for recurrent, refractory, and/or severe CDI. IC patients included those with: solid organ transplantation (SOT) receiving immunosuppressive medications; neoplasm; hematopoietic stem cell transplantation (HSCT); inflammatory bowel disease (IBD) requiring immunosuppressive medication(s). We collected demographic and clinical data, as well as outcomes, including: resolution of diarrhea, CDI relapse, and adverse events within 3 months post-FMT. RESULTS: We performed 37 pediatric FMT for recurrent, refractory, and/or severe CDI between September 2012 and February 2017. Of these, 12 were immunocompromised children: 2 with SOT; 3 with neoplasm and/or HSCT; and 7 with IBD on immunosuppressive medication(s). Median age was 11.9 years old (range 3–16 years). 6 (50%) experienced resolution of diarrhea within 1 week post-FMT, and 9 (67%) were C. difficile negative within 3 months of FMT (3 patients did not have follow-up testing). None had CDI relapse within 3 months post-FMT. 3 (25%) had adverse event(s) within 3 months post-FMT, 2 of whom had SAEs: 1 had graft rejection at 2 months post-FMT which ultimately required re-transplantion and 1 had aspiration pneumonitis immediately following FMT. 4 (50%) of the IBD patients had disease remission (clinical, biologic, and/or histologic) in the 3 months post-FMT. CONCLUSION: FMT appears to be effective and reasonably safe for recurrent CDI in immunocompromised pediatric patients. However, the small numbers limit conclusions, especially about safety. Larger multicenter studies are needed to precisely determine safety and efficacy in this specialized population. DISCLOSURES: All authors: No reported disclosures.