RecruitingPhase 1Drug trialStudy to Evaluate the Fecal Microbiota Transplantation (FMT) in the Treatment of Ulcerative ColitisThe study is to evaluate the safety, feasibility, and preliminary efficacy of frozen FMT delivery via retention enema compared to lyophilized powder given in oral capsules as induction FMT in subjects with active UC. This study will also determine changes in microbiome (diversity and genera) and proportion of antibody-coated microbiota from baseline to after completion of FMT.