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. 2014 Mar;30(2):389-92.

Isolation and antibiotic susceptibility of E. coli from urinary tract infections in a tertiary care hospital

Sumera Sabir  1 , Aftab Ahmad Anjum  2 , Tayyaba Ijaz  3 , Muhammad Asad Ali  4 , Muti Ur Rehman Khan  5 , Muhammad Nawaz  6
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Isolation and antibiotic susceptibility of E. coli from urinary tract infections in a tertiary care hospital

Sumera Sabir et al. Pak J Med Sci. 2014 Mar.

Abstract

Objective: The study was conducted to isolate and determine the antibiotic resistance in E. coli from urinary tract infections in a tertiary care hospital, Lahore.

Methods: Urine samples (n=500) were collected from patients with signs and symptoms of Urinary tract infections. Bacteria were isolated and identified by conventional biochemical profile. Antibiotic resistance pattern of E. coli against different antibiotic was determined by Kirby-Baur method.

Results: Bacterial etiological agent was isolated from 402 samples with highest prevalence of E. coli (321, 80%) followed by Staphylococcus aureus (9.4%), Proteus species (5.4%) and Pseudomonas species (5.2%). The E. coli were highly resistant to penicillin (100%), amoxicillin (100%) and cefotaxime (89.7%), followed by intermediate level of resistance to ceftazidime (73.8%), cephradine (73.8%), tetracycline (69.4%), doxycycline (66.6%), augmentin (62.6%), gentamycin (59.8%), cefuroxime (58.2%), ciprofloxacin (54.2%), cefaclor (50%), aztreonam (44.8%), ceftriaxone (43.3%), imipenem (43.3%), and low level of resistance to streptomycin (30%), kanamycin (19.9%), tazocin (14%), amikacin (12.7%) and lowest to norfloxacin (11.2%). Out of 321 E. coli isolates, 261 (81%) were declared as multiple drug resistant and 5 (1.5%) were extensive drug resistant.

Conclusion: It is concluded that most of the urinary tract infections in human are caused by multiple drug resistant E. coli.

Keywords: Antibiotic resistance; E. coli; MDR; Prevalence; Urinary tract infections.

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