DISSEMINATION OF EXTENDED-SPECTRUM β-LACTAMASES AND QUINOLONE RESISTANCE GENES AMONG CLINICAL ISOLATES OF UROPATHOGENIC ESCHERICHIA COLI IN CHILDREN

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SEDIGHI IRAJ; ARABESTANI MOHAMMAD REZA; RAHIMBAKHSH ALI; KARIMITABAR ZAHRA; ALIKHANI MOHAMMAD YOUSEF

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Journal: Jundishapur Journal of Microbiology Year:2015 | Volume:8 | Issue:7 Page(s): 0-0

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Title

DISSEMINATION OF EXTENDED-SPECTRUM β-LACTAMASES AND QUINOLONE RESISTANCE GENES AMONG CLINICAL ISOLATES OF UROPATHOGENIC ESCHERICHIA COLI IN CHILDREN

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Keywords

QUINOLONES

ANTIBIOTIC RESISTANCE

ESCHERICHIA COLI

Abstract

Background: Urinary tract infection (UTI) is one of the most common childhood bacterial infections and ESCHERICHIA COLI is the major pathogen. Producing b-lactamase enzymes are the most common mechanism of bacterial resistance.Objectives: This study aimed to determine the prevalence of Extended-Spectrum b-Lactamases (ESBLs) and Quinolone Resistance (qnr) genes in E. coli strains isolated from UTIs.Materials and Methods: In this study, a total of 120 isolates of E. coli from urinary tract infections of the children were collected at Besat Hospital in Hamadan, Iran, from October 2010 to October 2011. The bacterial isolates were identified by standard biochemical methods. Antimicrobial susceptibilities were determined by disk diffusion method, and ESBLs-producing was confirmed phenotypically using the double-disk synergy (DDS) test. The presence and identification of ESBLs and qnr genes were determined by Polymerase Chain Reaction (PCR).Results: The highest sensitivity was seen to imipenem (96.7%), amikacin (92.5%), nitrofurantoin (93.3%), ofloxacin (81.7%), gentamicin norfloxacin (70.8%), and ciprofloxacin (79.2%). In contrast, the highest rate of resistance was seen to co-trimoxazole (77%) and nalidixic acid (40.9%). The results showed that 6 (2.18%) and 4 (1.12%) isolates of ESBL-producing E. coli were positive with respect to having qnrB and qnrS genes, respectively. No isolates was found to have qnrA.Conclusions: CTX-M was the most prevalent ESBL genotype in uropathogenic E. coli (UPEC) isolated from UTI. In addition, a high frequency of qnr genes among ESBL-producing E. coli was identified in this study. In order to avoid treatment failures, we recommend using phenotypic and molecular methods to diagnose these enzymes and qnr genes.

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APA: Copy

SEDIGHI, IRAJ, ARABESTANI, MOHAMMAD REZA, RAHIMBAKHSH, ALI, KARIMITABAR, ZAHRA, & ALIKHANI, MOHAMMAD YOUSEF. (2015). DISSEMINATION OF EXTENDED-SPECTRUM β-LACTAMASES AND QUINOLONE RESISTANCE GENES AMONG CLINICAL ISOLATES OF UROPATHOGENIC ESCHERICHIA COLI IN CHILDREN. JUNDISHAPUR JOURNAL OF MICROBIOLOGY (JJM), 8(7), 0-0. SID. https://sid.ir/paper/317519/en

Vancouver: Copy

SEDIGHI IRAJ, ARABESTANI MOHAMMAD REZA, RAHIMBAKHSH ALI, KARIMITABAR ZAHRA, ALIKHANI MOHAMMAD YOUSEF. DISSEMINATION OF EXTENDED-SPECTRUM β-LACTAMASES AND QUINOLONE RESISTANCE GENES AMONG CLINICAL ISOLATES OF UROPATHOGENIC ESCHERICHIA COLI IN CHILDREN. JUNDISHAPUR JOURNAL OF MICROBIOLOGY (JJM)[Internet]. 2015;8(7):0-0. Available from: https://sid.ir/paper/317519/en

IEEE: Copy

IRAJ SEDIGHI, MOHAMMAD REZA ARABESTANI, ALI RAHIMBAKHSH, ZAHRA KARIMITABAR, and MOHAMMAD YOUSEF ALIKHANI, “DISSEMINATION OF EXTENDED-SPECTRUM β-LACTAMASES AND QUINOLONE RESISTANCE GENES AMONG CLINICAL ISOLATES OF UROPATHOGENIC ESCHERICHIA COLI IN CHILDREN,” JUNDISHAPUR JOURNAL OF MICROBIOLOGY (JJM), vol. 8, no. 7, pp. 0–0, 2015, [Online]. Available: https://sid.ir/paper/317519/en

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