Up to 5 percent of all prenatal ultrasounds uncover antenatal hydronephrosis, or enlarged kidneys, the most commonly detected prenatal abnormality in the United States. Many children with this abnormality are treated continually with preventive antibiotics for the first few years of life with the hopes of preventing the condition's associated urinary tract infections. Until recently, however, little evidence existed as to the benefits of this treatment, which involves considerable cost and inconvenience for families. But a study published this week in the Journal of Pediatric Urology found that, in most cases, continuous antibiotics for these children are unnecessary, findings that are especially of interest amidst increasing concern regarding antibiotic overuse.
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