Ulcerative Colitis (UC) is type of inflammatory bowel disease (IBD) which has been linked to the gut microbiome. FMT has been used in the treatment of UC by research scientists and doctors in clinical practice. Multiple studies have utilized FMT as a treatment for ulcerative colitis.

Article Abstract 1:

Fecal Microbiota Transplantation for Ulcerative Colitis: A Systematic Review and Meta-Analysis
. 2016; 11(6): e0157259. Published online 2016 Jun 13. doi:  10.1371/journal.pone.0157259

Twenty five studies (2 randomized controlled trials, 15 cohort studies, and 8 case studies) with 234 UC patients were included. Overall, 41.58% (84/202) patients achieved clinical remission (CR) and 65.28% (126/193) achieved clinical response. Among the cohort studies, the pooled estimate of patients who achieved CR and clinical response were 40.5% (95% CI 24.7%-58.7%), and 66.1% (95% CI 43.7%-83.0%). Most adverse events were slight and self-resolving. The analyses of gut microbiota in 7 studies showed that FMT could increase microbiota diversity and richness, similarity, and certain change of bacterial composition.

Article Abstract 2:

Single Delivery of High-Diversity Fecal Microbiota Preparation by Colonoscopy Is Safe and Effective in Increasing Microbial Diversity in Active Ulcerative Colitis.
Inflamm Bowel Dis. 2017 Jun;23(6):903-911. doi: 10.1097/MIB.0000000000001132.

Recent trials suggest fecal microbiota transplantation (FMT) with repeated enemas and high-diversity FMT donors is a promising treatment to induce remission in ulcerative colitis. Of the 20 patients enrolled in this study, 7 patients (35%) achieved a clinical response by week 4. Three patients (15%) were in remission at week 4 and 2 of these patients (10%) achieved mucosal healing. Three patients (15%) required escalation of care. No serious adverse events were observed. Microbiome analysis revealed that restricted diversity of recipients pre-FMT was significantly increased by high-diversity 2-donor FMP. The microbiome of recipients post-transplant was more similar to the donor FMP than the pretransplant recipient sample in both responders and nonresponders. Notably, donor composition correlated with clinical response.