[Statistical studies on bacteria isolated from urinary tract infections(report 5)]

Area of Science:

• Urology
• Microbiology
• Infectious Diseases

Background:

• Urinary tract infections (UTIs) are common, with bacterial etiology varying between community-acquired and hospital-acquired infections.
• Understanding the prevalence and antimicrobial susceptibility patterns of uropathogens is crucial for effective treatment.

Purpose of the Study:

• To analyze the bacterial isolates from urine samples of outpatients and inpatients in a urology department between 1985 and 1987.
• To compare the prevalence of specific bacterial species and their antimicrobial sensitivity between outpatient and inpatient populations.

Main Methods:

• Retrospective analysis of bacterial strains isolated from urine cultures.
• Identification and quantification of bacterial species.
• Antimicrobial susceptibility testing of selected isolates.

Main Results:

• A total of 3,350 bacterial strains were analyzed (2,566 from outpatients, 784 from inpatients).
• Gram-positive cocci were a significant proportion in both groups. Escherichia coli was the most frequent outpatient isolate, while Enterococcus was the most frequent inpatient isolate.
• Inpatient isolates showed lower drug sensitivity compared to outpatient isolates, particularly for strains of Serratia marcescens, Enterobacter cloacae, Citrobacter freundii, Staphylococcus epidermidis, and Staphylococcus aureus.

Conclusions:

• Gram-positive bacteria constituted a larger proportion of urinary isolates compared to previous studies.
• Differences in bacterial prevalence and antimicrobial sensitivity exist between outpatient and inpatient UTI cases.
• Outpatient uropathogens demonstrated broader antimicrobial susceptibility, highlighting the potential impact of healthcare settings on bacterial resistance patterns.