Longitudinal Bile Acid Composition Changes Following Faecal Microbiota Transplantation for Clostridioides difficile Infection in Children With and Without Underlying Inflammatory Bowel Disease.

Background And Aims: Faecal microbiota transplant [FMT] is effective in treating recurrent Clostridioides difficile infection [CDI] and restores gut microbiota composition. This is unlikely to account for its entire mechanism of efficacy, as studies have shown that factors such as bile acids influence the risk of infection by affecting Clostridioides difficile germination. We therefore aimed to investigate longitudinal changes in the gut bile acid composition after FMT performed for recurrent CDI, in children with and without inflammatory bowel disease [IBD].