Acute urinary tract infection--evaluation and treatment.

Area of Science:

• Pediatric Nephrology
• Infectious Diseases
• Urology

Background:

• Management of pediatric urinary tract infections (UTIs) is shifting due to new evidence and technology.
• Uncircumcised male infants face a higher UTI risk, with varying circumcision rates globally.
• Vesicoureteric reflux (VUR) is no longer considered the sole major risk factor for renal damage in UTIs; nonreflux nephropathy is now recognized.

Purpose of the Study:

• To review current evidence and technological impacts on UTI evaluation and management in infants and children.
• To discuss the changing understanding of risk factors for acquired renal damage from UTIs.
• To evaluate the utility of biochemical markers and imaging in identifying renal damage.

Main Methods:

• Review of evidence-based studies and technological advancements in pediatric UTI management.
• Analysis of data on risk factors for renal damage, including VUR and nonreflux nephropathy.
• Evaluation of procalcitonin as a biomarker for kidney damage risk and dimercaptosuccinic acid scintigraphy as a reference standard.

Main Results:

• The role of VUR as the primary cause of acquired renal injury secondary to UTI is being re-evaluated.
• Nonreflux nephropathy occurs with similar frequency to reflux nephropathy.
• Procalcitonin shows promise as a biochemical tool for assessing kidney damage risk.

Conclusions:

• The traditional view of VUR as the main driver of renal injury in UTIs is outdated.
• The necessity of imaging studies for VUR detection and suppressive antibiotics for VUR is now questioned.
• While evidence supports antibiotic therapy for UTIs, guidance for imaging selection in febrile infants is lacking.