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The purpose of this study is to determine the role of cranberry-containing products in preventing urinary tract infections (UTIs).
Although cranberry-containing products are commonly taken to prevent UTIs and other urinary symptoms, an optimally effective dose has not been established, and the chemicals responsible for the UTI-preventing properties in cranberry-containing products have yet to be determined. This study will determine the minimum dose of cranberry-containing product necessary to prevent UTIs, the effectiveness of cranberry-containing products in fighting different strains of E. coli, and the long-term effects of cranberry-containing product consumption. This study will also determine whether plant pigments called proanthocyanidins influence the UTI-preventing properties of cranberry-containing products.
This study will last 2 years. Participants will be randomly assigned to receive varying doses of either cranberry-containing products or placebo for 1 year. Some participants will receive cranberry or placebo supplement tablets; others will receive cranberry juice or a placebo beverage. Clinic visits will occur every 2 months; urine collection will occur at each visit. Some participants will be asked to collect 24-hour urine samples every 8 weeks and provide urine samples on Days 1, 3, 5 and 7.
Laboratory tests will be used to assess participants during the study. A 3-day course of antibiotics will be provided to participants developing a UTI during the course of the study. Telephone interview follow-up at 6 and 12 months after the study will determine whether cranberry-containing product use has continued and whether UTIs have recurred.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double-Blind, Primary Purpose: Prevention
Urinary Tract Infection
Cranberry juice cocktail, Cranberry tablets
Bladder Care Centre, University of British Columbia
National Center for Complementary and Alternative Medicine (NCCAM)
Published on BioPortfolio: 2014-07-23T21:51:47-0400
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A plant genus in the family CAPRIFOLIACEAE. The common name derives from its traditional use for menstrual cramps. It is a source of viburnine, valerianic acid, vibsanin, and ursolic acid. Note that true cranberry is VACCINIUM MACROCARPON.
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The presence of bacteria in the urine which is normally bacteria-free. These bacteria are from the URINARY TRACT and are not contaminants of the surrounding tissues. Bacteriuria can be symptomatic or asymptomatic. Significant bacteriuria is an indicator of urinary tract infection.
A surgical specialty concerned with the study, diagnosis, and treatment of diseases of the urinary tract in both sexes, and the genital tract in the male. Common urological problems include urinary obstruction, URINARY INCONTINENCE, infections, and UROGENITAL NEOPLASMS.
A human disease caused by the infection of parasitic worms SCHISTOSOMA HAEMATOBIUM. It is endemic in AFRICA and parts of the MIDDLE EAST. Tissue damages most often occur in the URINARY TRACT, specifically the URINARY BLADDER.
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