AAP revises pediatric UTI diagnostic definition for 2026 guideline

This technical report accompanies the American Academy of Pediatrics' 2026 Clinical Practice Guideline on diagnosis and management of UTI in children 8 days to 5 years of age, explaining the rationale behind a revised UTI definition. The panel states the definition is based on symptoms, signs of inflammation, and culture results, and it revised criteria for pyuria (with thresholds varying by age and culture availability) and for positive culture results (varying by age and collection method). The panel reports its goal was to use current evidence to avoid overdiagnosis and overtreatment while minimizing missed or delayed diagnoses.

Most relevant for: Clinicians diagnosing and managing suspected urinary tract infection in children aged 8 days to 5 years.

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