Antibiotic resistance of urinary tract pathogens and rationale for empirical intravenous therapy

Area of Science:

• Pediatric infectious diseases
• Antimicrobial resistance surveillance
• Urology

Background:

• Empirical antibiotic therapy for pediatric urinary tract infections (UTI) necessitates robust surveillance data on common uropathogen epidemiology and resistance patterns.
• Previous studies highlight the importance of local resistance data for guiding effective UTI treatment in children.

Purpose of the Study:

• To analyze the epidemiological and resistance patterns of uropathogens causing UTI in children at a German university hospital.
• To determine appropriate empirical antibiotic treatment strategies for pediatric UTI based on current resistance data.

Main Methods:

• Retrospective analysis of bacterial isolates from pediatric urine samples collected in 1997 and from 1999 to 2001.
• Identification of common uropathogens and assessment of their antibiotic resistance profiles.

Main Results:

• Escherichia coli was the most prevalent uropathogen (57.2%), with nearly 50% resistance to ampicillin but low resistance to other key antibiotics.
• Enterococcus spp. and Pseudomonas aeruginosa showed varying resistance patterns, but generally remained susceptible to recommended agents.
• No significant changes in resistance patterns were observed between the two study periods.

Conclusions:

• Empirical combination therapy with ampicillin plus gentamicin, netilmicin, or tobramycin is suitable for children with UTI, regardless of prior treatment or underlying conditions.
• This therapeutic approach is clinically effective, well-tolerated, cost-effective, and helps mitigate the development of antimicrobial resistance.