Loisieux

Researchers are studying VE303, a live biotherapeutic product made of nonpathogenic bacteria strains, to evaluate its safety and effectiveness in preventing recurrent Clostridioides difficile infection CDI. This Phase 3 trial compares VE303 to a placebo in participants who recently completed standard antibiotic treatment for CDI. The study focuses on two groups those with recurrent CDI and individuals at high risk for primary CDI recurrence. Participants will receive either VE303 or a matching placebo capsule three times daily for 14 days, following 10 to 21 days of standard antibiotic therapy for CDI. VE303 capsules contain the study bacteria, while placebo capsules contain a non-active substance identical in appearance. Both groups complete this treatment regimen as part of the trial. During the study, participants are monitored for safety and CDI recurrence up to 8 weeks after treatment starts. Researchers collect stool samples and track symptoms to assess recurrence rates. The study uses a randomized, double-blind design to ensure unbiased results, and participants are followed closely through the treatment and observation periods, which last several weeks.