For the study, subjects who are undergoing the above treatment per standard of care will be asked to submit four (4) total stool samples. The first will be pre-FMT, at any time from 2 weeks prior to FMT (possibly at a clinic visit), up until directly before the pre-FMT bowel preparation. Post-FMT stool samples at 2 weeks (range 1-3 weeks), 2 months (range 7-9 weeks) and 6 months post-FMT.