Screening for bacteriuria in Japanese school children

Area of Science:

• Pediatrics
• Urology
• Microbiology

Background:

• Bacteriuria, the presence of bacteria in urine, is a common concern in pediatric populations.
• Screening for bacteriuria is crucial for early detection and management of potential urinary tract issues.
• Accurate diagnostic methods are essential for reliable bacteriuria screening in children.

Purpose of the Study:

• To screen a large cohort of healthy school children for bacteriuria.
• To evaluate the prevalence of bacteriuria in boys and girls.
• To assess the accuracy of dipstick and dipslide methods compared to pour plate culture and identify persistent cases.

Main Methods:

• A large-scale screening of 28,202 healthy school children (14,575 boys, 13,627 girls) was conducted.
• Urine samples were analyzed using dipstick, dipslide (Microstix-3), and pour plate culture methods.
• Persistent bacteriuria was monitored through monthly urine cultures for 9 months post-screening.

Main Results:

• The prevalence of bacteriuria was 0.06% in boys and 0.52% in girls after the third screening.
• Dipstick tests showed a high rate of false negatives, while dipslide methods yielded a high rate of false positives.
• Approximately 60% of children with initial bacteriuria showed persistent infection over 9 months.
• Urinary tract anomalies were identified in 9 out of 26 children with persistent bacteriuria.

Conclusions:

• Bacteriuria screening in school children revealed a higher prevalence in girls.
• Diagnostic limitations exist with dipstick and dipslide methods, necessitating careful interpretation.
• Persistent bacteriuria is common and associated with urinary tract anomalies, underscoring the need for follow-up and further investigation.