[Statistical studies on bacteria isolated from urinary tract infections (report 4)]

Area of Science:

• Microbiology
• Infectious Diseases
• Clinical Pharmacy

Context:

• Review of bacterial florae and drug sensitivity from urinary tract infections (UTIs) in 1983-1984.
• Analysis of 2,222 outpatient and 507 inpatient strains.
• Comparison with previous reports on bacterial prevalence and antimicrobial susceptibility.

Purpose:

• To analyze the changing patterns of bacterial isolates in UTIs.
• To assess antimicrobial susceptibility trends in outpatient and inpatient settings.
• To investigate potential correlations between antibiotic usage and isolate prevalence.

Summary:

• Gram-positive cocci were the most common isolates in both groups. E. coli and Proteus sp. were prevalent in outpatients, while Enterococcus and P. aeruginosa predominated in inpatients.
• P. aeruginosa and Enterococcus showed increased prevalence compared to previous reports. E. coli, K. pneumoniae, and S. epidermidis showed decreased prevalence.
• Outpatient isolates exhibited greater susceptibility to tested antimicrobial agents. However, susceptibility to gentamicin, tetracycline, and nalidixic acid decreased overall. Increased Enterococcus isolates in inpatients may be linked to cefem antibiotic use.

Impact:

• Highlights evolving bacterial resistance patterns in UTIs, crucial for guiding empirical treatment strategies.
• Provides data on antimicrobial susceptibility changes, informing antibiotic stewardship and treatment guidelines.
• Suggests a potential link between newer antibiotic classes and shifts in bacterial populations, necessitating ongoing surveillance.