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Infectious Diseases in Obstetrics and Gynecology
Volume 2007 (2007), Article ID 35387, 8 pages
Clinical Study

Phase I Trial of a Lactobacillus crispatus Vaginal Suppository for Prevention of Recurrent Urinary Tract Infection in Women

Division of Allergy and Infectious Diseases, University of Washington School of Medicine, Seattle, WA 98195, USA

Received 15 June 2007; Accepted 26 September 2007

Copyright © 2007 Christopher A. Czaja et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objectives: We performed a phase I trial to assess the safety and tolerance of a Lactobacillus vaginal suppository for prevention of recurrent UTI. Methods: Premenopausal women with a history of recurrent UTI were randomized to use L. crispatus CTV-05 or placebo vaginal suppositories daily for five days. Results: 30 women were randomized (15 to L. crispatus CTV-05). No severe adverse events occurred. Mild to moderate vaginal discharge and genital irritation were reported by women in both study arms. Seven women randomized to L. crispatus CTV-05 developed pyuria without associated symptoms. Most women had high concentrations of vaginal H202-producing lactobacilli before randomization. L. crispatus, L. jensenii, and L. gasseri were the most common Lactobacillus species identified, with stable prevalence over time. Conclusions: L. crispatus CTV-05 can be given as a vaginal suppository with minimal sideeffects to healthy women with a history of recurrent UTI. Mild inflammation of the urinary tract was noted in some women.