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Low yield from imaging after non -E. coli urine tract infections in children treated in primary care and emergency department.
Archives of Disease in Childhood 2023 March 4
BACKGROUND: Imaging is recommended for selected children following urinary tract infections (UTIs) to look for actionable structural abnormalities. Non -E. coli is considered high risk in many national guidelines, but evidence is mainly drawn from small cohorts from tertiary centres.
OBJECTIVE: To ascertain imaging yield from infants and children <12 years diagnosed with their first confirmed UTI (pure single growth >100 000 cfu per ml) in primary care or an emergency department without admission stratified by bacteria type.
DESIGN, SETTING, PATIENTS: Data were collected from an administrative database of a UK citywide direct access UTI service between 2000 and 2021. Imaging policy mandated renal tract ultrasound and Technetium-99m dimercaptosuccinic acid scans in all children, plus micturating cystourethrogram in infants <12 months.
RESULTS: 7730 children (79% girls, 16% aged <1 year, 55% 1-4 years) underwent imaging after first UTI diagnosed by primary care (81%) or emergency department without admission (13%). E. coli UTI yielded abnormal kidney imaging in 8.9% (566/6384). Enterococcus and KPP ( Klebsiella , Proteus , Pseudomonas ) yielded 5.6% (42/749) and 5.0% (24/483) with relative risks 0.63 (95% CI 0.47 to 0.86) and 0.56 (0.38 to 0.83)), respectively. No difference was found when stratified by age banding or imaging modality.
CONCLUSION: In this largest published group of infants and children diagnosed in primary and emergency care not requiring admission, non -E. coli UTI was not associated with a higher yield from renal tract imaging.
OBJECTIVE: To ascertain imaging yield from infants and children <12 years diagnosed with their first confirmed UTI (pure single growth >100 000 cfu per ml) in primary care or an emergency department without admission stratified by bacteria type.
DESIGN, SETTING, PATIENTS: Data were collected from an administrative database of a UK citywide direct access UTI service between 2000 and 2021. Imaging policy mandated renal tract ultrasound and Technetium-99m dimercaptosuccinic acid scans in all children, plus micturating cystourethrogram in infants <12 months.
RESULTS: 7730 children (79% girls, 16% aged <1 year, 55% 1-4 years) underwent imaging after first UTI diagnosed by primary care (81%) or emergency department without admission (13%). E. coli UTI yielded abnormal kidney imaging in 8.9% (566/6384). Enterococcus and KPP ( Klebsiella , Proteus , Pseudomonas ) yielded 5.6% (42/749) and 5.0% (24/483) with relative risks 0.63 (95% CI 0.47 to 0.86) and 0.56 (0.38 to 0.83)), respectively. No difference was found when stratified by age banding or imaging modality.
CONCLUSION: In this largest published group of infants and children diagnosed in primary and emergency care not requiring admission, non -E. coli UTI was not associated with a higher yield from renal tract imaging.
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