Abstract
This study was designed to determine the distribution of bacterial strains isolated from patients with urinary tract infections (UTI) at Sukrararj Tropical and Infectious Disease Hospital (STIDH) with special reference to ESBL, ABL and the co-existence of the phenotype (ESBL and ABL in the population of different uropathogens. Urine samples from 500 patients suspected of UTI were analyzed by conventional semi-quantitative culture technique. The antimicrobial susceptibility to various drugs was studied by the Modified Kirby-Bauer disk diffusion method, by following the ClSI guidelines. Confirmation of the extended spectrum β-lactamase (ESBL) and AmpC β-lactamase production was done by the phenotypic confirmatory disc diffusion test (PCDDT) and the AmpC disk test (ADT). Overall, the prevalence of ESBL and ABL and the co-existence of the phenotype (ESBL and ABL) in urinary isolates were found to be 39.22%, 15.69% and 5.88%. The implementation of appropriate infection control measures and the formulation of an antibiotic policy must be done, to prevent the spread of these strains.
 Key words: MDR, ESBLs. AmpC β-lactamase
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