<i>Clostridioides difficile</i> colonization is not mediated by bile salts and utilizes Stickland fermentation of proline in an <i>in vitro</i> model.

ABSTRACT: Treatment with antibiotics is a major risk factor for Clostridioides difficile infection, likely due to depletion of the gastrointestinal microbiota. Two microbiota-mediated mechanisms thought to limit C. difficile colonization include the conversion of conjugated primary bile salts into secondary bile salts toxic to C. difficile growth and competition between the microbiota and C. difficile for limiting nutrients. Using a continuous flow model that simulates the nutrient conditions of the distal colon, we investigated how treatment with 6 clinically used antibiotics influenced susceptibility to C. difficile infection in 12 different microbial communities cultivated from healthy individuals. Antibiotic treatment reduced microbial richness; disruption vari

SUBMITTER: Huang X 

PROVIDER: S-EPMC11852769 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature