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The first urinary tract infection in the female infant. Prevalence, recurrence, and prognosis: a 10-year study in
Insights
Early urinary tract infections (UTIs) in female infants can lead to recurrent infections and pyelonephritis. Asymptomatic UTIs in infants require vigilant monitoring by parents.
Area of Science:
- Pediatric Nephrology
- Infectious Diseases
- Public Health Screening
Background:
- Urinary tract infections (UTIs) are common in infants.
- Early detection and management are crucial for preventing long-term complications.
Purpose of the Study:
- To investigate the incidence and progression of UTIs in healthy female infants.
- To identify risk factors for recurrent infections and pyelonephritis.
Main Methods:
- Systematic screening for bacteriuria in 800 healthy female infants from infancy to 2 years.
- Continued monitoring of infants with bacteriuria up to 6 years of age.
- Utilized a urinary diary for parental observation of voiding habits.
Main Results:
- 29 infants (3.6%) developed initial UTIs at a median age of 9 months.
- Nine infants experienced recurrent infections within an 18-month period, ceasing after 3 years of age.
- Three infants developed clinically inapparent pyelonephritis, often associated with recurrent infections.
Conclusions:
- Asymptomatic UTIs in infants can lead to recurrent infections and pyelonephritis.
- Parental education and monitoring via urinary diaries can detect subtle signs of lower urinary tract infection.
- Early detection and intervention are vital for preventing renal scarring and long-term sequelae in pediatric UTIs.
Abstract:
Eight hundred healthy female infants presenting for routine care were systematically screened for bacteriuria from early infancy to 2 years of age. The initial urinary tract infection was established in 29 infants, 3.6% of the series, at a median age of 9 months. Continued systematic screening of 25 of these 29 infants with bacteriuria to 6 years of age revealed recurrent infection in nine of them and the development of pyelonephritis in three. Recurrent episodes of infection occurred at close intervals of 2 weeks to 4 months in these nine infants and were clustered within an 18-month period. There were no recurrences after 3 years of age. Characteristically, both the initial and recurrent infections were asymptomatic. Lower urinary tract signs of infection, however, were evident to the "instructed parent," i.e., one instructed in the use of the urinary diary, a written log of the parents' observations of the infant's voiding habits. Pyelonephritis developed early in the children with recurrent infections; it was clinically inapparent and developed in infants with (initially) normal urinary tracts.