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Urinary tract infections in children. Part I-- Young girls with non-refluxing ureters
Insights
Recurrent urinary tract infections (UTIs) in girls without ureterovesical reflux often require long-term antibiotic prophylaxis. Early intervention and prophylaxis are key to preventing morbidity and potential upper tract damage.
Area of Science:
- Pediatrics
- Infectious Diseases
- Urology
Background:
- Urinary tract infections (UTIs) are common in young girls.
- Ureterovesical reflux is a known risk factor for recurrent UTIs and renal scarring.
- This study focuses on girls with UTIs but without evidence of ureterovesical reflux.
Purpose of the Study:
- To investigate the characteristics and outcomes of urinary tract infections in girls without ureterovesical reflux.
- To evaluate the efficacy of short-term antibacterial therapy and identify patterns of recurrence.
- To assess the need for long-term management strategies.
Main Methods:
- Retrospective study of 144 girls with a history of UTIs, confirmed to be free of ureterovesical reflux.
- Analysis of infection episodes, causative organisms, and localization of infection (bladder vs. upper tract).
- Evaluation of recurrence rates following short-term antibiotic treatment over an average follow-up of 40 months.
Main Results:
- Most infections (85%) were localized to the bladder, with Escherichia coli being the most common pathogen.
- Only two patients showed evidence of upper tract damage.
- Despite short-term therapy, 80% of patients experienced recurrent infections, with a consistent 20% cure rate per treatment course.
- Urethral dilation did not reduce reinfection rates.
Conclusions:
- Girls without ureterovesical reflux are unlikely to develop significant upper tract damage from UTIs.
- The high recurrence rate supports the use of long-term antibacterial prophylaxis for girls with multiple infections.
- Prophylactic medication is justified to reduce patient morbidity associated with recurrent UTIs.
Abstract:
This paper is the study of 144 girls with histories of urinary tract infection followed at the Stanford Medical Center who were found to be free of ureterovesical reflux. The mean age at onset of infection for the entire group was about four years and ranged from the first few months of life to age 10. Ninety-two percent of the 505 infection episodes in these children presented with symptoms referable to the lower tract, and bacterial localization studies confirmed that 85 percent of the infections were limited to the bladder. Escherichia coli was the most common organism isolated and most infections were caused by a pure culture of a single bacteria. In only two of the 144 patients studied was there any evidence of upper tract damage related to infection. The possibility that these patients had reflux at an earlier age could not be discounted. In response to short-term antibacterial therapy in 66 of the patients followed closely for an average of 40 months each, 20 percent of the patients had no further infections and 80 percent went on to recurrence. With each succeeding treatment an additional 20 percent of the patients were "cured," but the remainder experienced recurrent infections during the follow-up. This reinfection pattern supports the use of long-term antibacterial prophylaxis in all girls who have more than three or four recurrences of infections. Urethral dilation appeared to have no value in reducing the reinfection rate. While it appears that in the absence of ureterovesical reflux few, if any, of these children will go on to develop upper tract damage, long-term prophylactic suppressive medication can clearly be justified on the grounds of reducing patient morbidity.