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How can diapers contribute to urinary tract infections in infants?

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In infants, diapers can contribute to the development of a urinary tract infection (UTI) because they can facilitate the entry of microorganisms into the urethra.1

By keeping the area around the urethra moist and potentially in contact with fecal matter, diapers may create an environment that allows bacteria—such as Escherichia coli—to migrate into the urinary tract. Once these organisms enter the urethra, they can cause inflammation of the bladder or, if the infection spreads, lead to more serious complications in the upper urinary tract.1