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Single-dose amoxicillin therapy of uncomplicated pediatric urinary tract infections
Insights
Single-dose amoxicillin for pediatric urinary tract infections (UTIs) showed a lower cure rate (63%) compared to conventional 10-day therapy (92%). This approach is unreliable for identifying patients needing further evaluation for kidney damage.
Area of Science:
- Pediatric Infectious Diseases
- Antimicrobial Therapy
- Nephrology
Background:
- Urinary tract infections (UTIs) are common in children.
- Accurate diagnosis and effective treatment are crucial to prevent renal scarring.
- Evaluating shorter antibiotic courses is important for adherence and reducing resistance.
Purpose of the Study:
- To compare the efficacy of single-dose amoxicillin versus conventional 10-day therapy for acute, uncomplicated UTIs in children.
- To assess the utility of single-dose therapy failure in predicting underlying radiologic abnormalities.
- To evaluate the role of the antibody-coated bacteria (ACB) assay in differentiating upper and lower UTIs.
Main Methods:
- Randomized trial involving 49 ambulatory children aged 2.5-12 years with acute, uncomplicated UTIs.
- Participants received either a single dose or a 10-day course of amoxicillin.
- Cure rates, radiologic abnormalities, and ACB assay results were analyzed.
Main Results:
- The cure rate for single-dose amoxicillin was 63%, significantly lower than the 92% for conventional therapy.
- Failure of single-dose therapy had poor sensitivity (60%) and specificity (58%) for predicting radiologic abnormalities.
- The ACB assay did not reliably differentiate upper from lower UTIs.
Conclusions:
- Single-dose amoxicillin is less effective than conventional therapy for pediatric UTIs.
- Single-dose therapy failure is not a reliable indicator of underlying renal parenchymal damage.
- The ACB assay has limited value in clinical decision-making for pediatric UTIs.
Abstract:
Forty-nine ambulatory children between 2-1/2 and 12 years of age with acute, clinically uncomplicated urinary tract infections caused by susceptible organisms were randomized to receive a single dose of amoxicillin based on weight or a 10-day course of amoxicillin therapy (conventional therapy). Patients receiving single doses of amoxicillin had a cure rate of 63%, which compares unfavorably with the cure rate of 92% in patients given conventional therapy. A failure of single-dose therapy predicted underlying radiologic abnormalities with a sensitivity of 60% and a specificity of 58%, making it a poor screening test for detecting those patients at risk for renal parenchymal damage. The antibody-coated bacteria assay had no predictive value in separating upper and lower tract disease, although it may predict underlying radiologic abnormalities. The data indicate that the response to single-dose amoxicillin therapy fails to separate upper from lower tract disease reliably and has a limited role in predicting response to conventional antimicrobial therapy.