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1. Shifa College of Medical Technology (SCMT) - Shifa Tameer-e-Millat University, Islamabad.

To find the most suitable antibiotic against urinary tract infection caused by Extended Spectrum Beta Lactamase producing uropathogens, and the epidemiology of Extended Spectrum Beta Lactamase producers. The cross-sectional study was conducted at Pir Mehr Ali Shah University of Arid Agriculture, Rawalpindi, Pakistan, from July 2014 to July 2015, and comprised urine samples of patients suffering from urinary tract infection which were cultured on Cysteine Lactose Electrolyte Deficient agar medium. Analysis was done on Muller- Hintonagar plates and optical density was set as 0.1 at 530nm. Antimicrobial sensitivity was tested using Kirby-Bauer disc diffusion method. Further confirmation was done through gram staining and biochemical tests. Extended Spectrum Beta Lactamase production was confirmed through phenotypic methods, including phenotypic confirmatory disc diffusion test, double disc synergy test and Epsilometer test. Of the 150 samples, 98(65%) showed growth of a total of 114 pathogenic isolates. Escherichia coli was the commonest organism in 94(82%) samples. Piperacillin Tazocin was the most suitable antimicrobial drug in 88(90%) cases. Overall, 23(20%) isolates were producers of Extended Spectrum Beta Lactamase. Piperacillin Tazocin was found to be the drug of choice for patient suffering from urinary tract infection.

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