Clostridium Difficile Infection Recurrence

Single-arm trial to evaluate the safety and efficacy of ACX-362E \[ibezapolstat\] in patients with recurrent C. difficile infection (CDI).

The overall objective of the RESTORATiVE303 study is to evaluate the safety and the Clostridioides difficile infection (CDI) recurrence rate at Week 8 in participants who receive a 14-day course of VE303 or matching placebo. The objectives and endpoints are identical for Stage 1 (recurrent CDI) and Stage 2 (high-risk primary CDI).

The purpose of this study is to see if stool transplant performed by colonoscopy is effective at treating recurrent Clostridium difficile (C. diff) infection of the colon. During the procedure a stool sample is taken from a healthy donor (usually family member or close friend) and transplanted directly into the colon of the patient with C. diff infection. The goal of this experimental procedure (called fecal microbiota transplantation) is to replenish the good bacteria in the colon that can help prevent C. diff infection from coming back after treatment.

This is a large-scale observational study aiming to evaluate the long-term effectiveness and safety of Fecal Microbiota Transplantation (FMT). FMT is a procedure that transfers gut bacteria from healthy donors to patients to restore a balanced gut microbiome. The study will follow approximately 4,000 patients who have received or will receive FMT for conditions like recurrent C. difficile infection, inflammatory bowel disease, functional gastrointestinal disorders, and certain neurological conditions. The main goals are to: * Assess the disease remission rates at 3 months, 1 year, and 5 years after FMT. * Monitor the long-term safety and any potential side effects. * Identify factors that may influence how well a patient responds to the treatment. This research will use both existing patient data (retrospective cohort) and newly collected data from future patients (prospective cohort). The findings are expected to help improve and standardize FMT treatment for better patient care.