What is the AAP criteria for a diagnosis of a pediatric urinary tract infection (UTI)?

Updated: Mar 19, 2019
  • Author: Donna J Fisher, MD; Chief Editor: Russell W Steele, MD  more...
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The American Academy of Pediatrics (AAP) criteria for the diagnosis of urinary tract infection (UTI) in children 2-24 months are the presence of pyuria and/or bacteriuria on urinalysis and the presence of at least 50,000 colony-forming units (CFU) per mL of a uropathogen from the quantitative culture of a properly collected urine specimen. In neonates younger than 2 months of age, criteria include the presence of lower amounts of a single pathogen (10,000-50,000 CFU/mL). [3]

Due to concerns over urinalysis sensitivity in young infants, a study collected urinalysis results on a cross-sectional sample of 276 infants < 3 months of age with bacteremic UTI from 11 hospital systems. The study concluded that in young infants with bacteremic UTI, urinalysis sensitivity in infants with UTI in general is higher than what has been previously reported. [16]

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