Phase 12 Study to Evaluate Safety, Immune Response, and Effectiveness of a Urinary Tract Infection Vaccine in Adults 18 to 64 Years Includes Clinical Efficacy Assessment in Females 18 to 64 Years

What this Trial Is About

Researchers are evaluating the safety, immune response, and preliminary clinical efficacy of a candidate vaccine for urinary tract infections UTIs in adults aged 18 to 64 years. This trial focuses on adults generally for safety and immune response, and specifically on females with a history of at least one confirmed E. coli UTI within the past year for clinical efficacy. The study includes two parts an initial dose-escalation safety phase and a proof-of-principle efficacy phase, designed to establish the highest tolerated dose and evaluate the vaccines impact on UTI occurrence. Participants receive one of several vaccine dose formulations or placebo administered by injection on Day 1 and Day 61. Part 1 involves healthy male and female adults and tests increasing antigen doses for safety. After safety review, Part 2 enrolls females with previous E. coli UTIs to assess vaccine efficacy compared to placebo over a 12-month period. The vaccine is given intramuscularly following a 0 and 2 months schedule. Throughout the study, participants are monitored for side effects at the injection site and systemic reactions during the first week after each dose, as well as for any adverse events up to 426 days from the first dose. Blood tests, pregnancy monitoring, and clinical exams are conducted. The main outcome measures include the frequency of adverse events and the rate of urine culture confirmed UTIs in females during the follow-up period. Participants are followed closely for safety and immune response, with the trial lasting over a year from initial vaccination.

A Study on the Safety and Immune Response of a Urinary Tract Infection (UTI) Vaccine in Adults 18-64 Years of Age and Clinical Efficacy in Females 18-64 Years of Age