Prevalence and Resistance Pattern of Extended-Spectrum β-Lactamase Producing Escherichia coli Isolated from Patients with Urinary Tract Infection
Archives of Medical Laboratory Sciences,
Vol. 6 (2020),
20 January 2020
,
Page 1-7 (e13)
https://doi.org/10.22037/amls.v6.33081
Abstract
Background and Aim: Urinary tract infections (UTIs) are one of the most common infectious diseases. Although UTI is mostly associated with several members of the family of Enterobacteriaceae, Escherichia coli (E. coli) is the most common pathogen among them. This study aims to determine the prevalence and resistance pattern of ESBL producing E. coli isolated from patients with urinary tract infection in Sari, Iran.
Methods: From December-2016 to June-2017, a hospital-based cross-sectional work was accompanied, and a total of 200 urine samples were cultured on blood agar and MacConkey agar for the identification of etiologic agents. After detection and confirmation of E. coli isolates, susceptibility testing was assessed using the following antibiotics: cefotaxime, ceftazidime, imipenem, nalidixic acid, cefixime, amikacin, ofloxacin, ceftriaxone, cefepime, gentamicin, tobramycin, meropenem, piracetam, and ciprofloxacin with Kirby–Bauer disk-diffusion technique according to the CLSI guidelines. Double-disk synergy (DDS) methods were used for the detection of ESBL-producing strains.
Results: In the current study, 120 urinary isolates of E. coli were detected, which ESBL-producing phenotypes were detected in 55% (n = 66) of the isolates. ESBL producing strains of E. coli showed the highest susceptibility to meropenem (100%) and ofloxacin (96%); and showed the highest rates of resistance to ceftazidime (91%), cefepime (87%), cefotaxime, and ceftriaxone (84%).
Conclusion: Markedly high resistance to third-generation cephalosporins among E. coli strains was found in the current study. Considering the high prevalence of resistance to third-generation cephalosporins in infections caused by organisms producing ESBL, performing comprehensive tests before prescribing antibiotics is essential for the management of infections caused by these strains in community/hospital-acquired UTIs. Furthermore accompanying molecular-based works on ESBL variants will assistance to achieve better results.
*Corresponding Author: Mehrdad Gholami; Email: me.gholami@mazums.ac.ir
Please cite this article as: Ahanjan M, Salehian M, Gholami M. Prevalence and Resistance Pattern of Extended-Spectrum β-Lactamase Producing Escherichia coli Isolated from Patients with Urinary Tract Infection. Arch Med Lab Sci. 2020;6:1-7 (e13). https://doi.org/10.22037/amls.v6.33081
- Escherichia coli
- Antimicrobial Resistance
- Extended-Spectrum β-Lactamase
- ESBL
- UTI
How to Cite
References
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