ANTIMICROBIAL RESISTANCE PROFILES OF UROPATHOGENS AND THEIR IMPLICATIONS FOR EMPIRICAL TREATMENT OF URINARY TRACT INFECTIONS
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Abstract
Antimicrobial resistance among uropathogens increasingly compromises empirical treatment of urinary tract infections and necessitates locally informed therapeutic strategies. This study characterized antimicrobial resistance profiles of Gram-negative uropathogens and evaluated their implications for empirical treatment. Secondary microbiological data were analyzed for 604 Gram-negative isolates, comprising Escherichia coli, Klebsiella spp., Pseudomonas spp., and Proteus spp. Susceptibility to seven antimicrobial agents was evaluated, alongside organism- and clinical-setting-specific resistance patterns and cumulative resistance burden. Escherichia coli was the predominant uropathogen (56.1%), followed by Klebsiella spp. (36.8%). Meropenem demonstrated the highest susceptibility (86.8%) and lowest resistance (10.6%), whereas amoxicillin-clavulanate showed the highest resistance (69.5%). Klebsiella spp. exhibited significantly greater resistance than E. coli to ciprofloxacin (41.9% vs. 31.3%) and meropenem (14.0% vs. 7.4%), with both differences remaining significant after false discovery rate correction (adjusted p=0.033). Overall, 43.2% of isolates were resistant to at least three of six universally tested agents. Clinical-setting differences did not remain significant after multiple-testing correction. These findings demonstrate substantial resistance heterogeneity among uropathogens and support routine local surveillance, culture-guided therapy, and antimicrobial stewardship to improve empirical UTI treatment while preserving effective antimicrobial options.
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