:: Volume 7, Issue 1 (Vol.7, No.1,spring 2019) ::
J Neyshabur Univ Med Sci 2019, 7(1): 134-143 Back to browse issues page
Assessment of Antibiotic Resistance pattern and Frequency of extended spectrum β-lactamases (ESBLs) in Gram Negative Bacteria isolated from Urine samples in Bandar-e Torkaman
Ania Ahani Azari Dr. * 1, Aydin Khajeh2, Ahmad Danesh3
1- Department of Microbiology, Gorgan Branch, Islamic Azad University, Gorgan, Iran , ania_783@yahoo.com
2- Department of Microbiology, Gorgan Branch, Islamic Azad University, Gorgan, Iran
3- Infectious Diseases Research Center, Golestan University of Medical Sciences, Gorgan, Iran
Abstract:   (555 Views)
Introduction
Antibiotic resistance is increasing in gram-negative bacteria that cause urinary tract infections. The aim of this study was to evaluate antibiotic resistance pattern and frequency of broad-spectrum β-lactamases (ESBLs) among gram-negative bacteria isolated from urine samples referred to clinical laboratories in Bandar Torkaman, Iran.
Materials and Methods
In this study, 138 positive urine samples were collected from patients with suspected urinary tract infection. In positive samples, gram-negative europathogens were identified using standard microbiological and biochemical tests and their antibiotic resistance patterns were determined by propagation in the disk method. Then, a phenotypic confirmatory test was performed for the detection of ESBLs producers.
Results
96 samples were positive for urinary infection due to gram-negative bacteria. The most isolated cases were: Escherichia coli (88.5%), Klebsiella pneumonia (5.2%), Enterobacter cloace (4.2%) and pseudomonas aerouginosa (2.1%). The E. coli isolates showed the highest resistance to ampicillin, nitrofurantoin and cefalotin and the lowest resistance to norfloxacin. Of the 35 isolates resistant to cefotaxime, 29 isolates were positive for ESBLs.
Conclusion
In this study, the most common cause of UTI was E. coli (88.5%). The frequency of ESBLs in E. coli isolates was similar to the results of other studies but it was very high inK. pneumonia isolates. The results of this study indicate an increasing trend of resistance to Extended-Spectrum cephalosporins. Therefore, antibiogram test before the antibiotic prescription could be a retional strategy to avoid further antibiotic resistance. 
Keywords: Antibiotic resistance, Betalactamase, Gram negative bacteria, Urinary tract infections
Full-Text [PDF 1033 kb]   (154 Downloads)    
Type of Study: Orginal Article | Subject: microbiology
Received: 2019/01/12 | Revised: 2019/04/29 | Accepted: 2019/02/17 | ePublished ahead of print: 2019/04/27 | Published: 2019/04/29 | ePublished: 2019/04/29


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Volume 7, Issue 1 (Vol.7, No.1,spring 2019) Back to browse issues page