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Molecular Detection and Association of QnrA, QnrB, QnrSand BlaCMYResistance Genes among Clinical Isolates of Salmonellaspp. in Iran

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Advances in Microbiology 2014年第1期4卷 63-68页

作者： Raheleh Saboohi bahareh rajaei Nahid Sepehri Rad Mohamad Reza Razavi Mohammad Reza Aghasadeghi Arfa Moshiri Ahmad Reza Bahremand Keivan Kave Peiman Kave Mehrangiz Zangeneh Mohammad Rahbar Sara Khorami Sarvestani Seyed Davar Siadat Department of Infectious Diseases Islamic Azad University Tehran Medical Branch Tehran Iran Department of Microbiology Iranian References Laboratory Research Center Ministry of Health and Medical Education Tehran Iran Department of Microbiology Pasteur Institute of Iran Tehran Iran Department of Microbiology Pasteur Institute of Iran Tehran Iran Department of Mycobacteriology & Lung Research Pasteur Institute of Iran Tehran Iran Department of Microbiology Pasteur Institute of Iran Tehran Iran Department of Stem Cells Division of Nanobiomaterials and Tissue Engineering National Institute of Genetic Engineering and Biotechnology Tehran Iran Department of Microbiology Pasteur Institute of Iran Tehran Iran Research Institute for Endocrine Sciences Shahid Beheshti University of Medical Sciences Tehran Iran Department of Mycobacteriology & Lung Research Pasteur Institute of Iran Tehran Iran Department of Veterinary Medicine Kermanshah University of Medical Sciences Kermanshah Iran Hope Generation Foundation Tehran Iran School of Management and Medical Informatics Isfahan University of Medical Sciences Isfahan Iran

Prevalence of three plasmid-mediated quinolone resistance determinant qnrA, qnrB, qnrS and extended spectrum Cephalosporins determinant blaCMY, among eighty-five isolates of Salmonella spp. collected in the community between 2008 and 2010 was determined by PCR. Not only qnr genes but also bla genes were positive in twenty-four different isolates. PCR assay detected that 22 of 85 (25.8%) Salmonella spp. carried the qnrA, 1 (1.17%) of 85 isolates harbored the qnrB, 1 (1.17%) of them contained the qnrS, 1 (1.17%) isolate carried all the three qnrA, qnrB, qnrS genes, 24 of 85 (28.2%) Salmonella carried blaCMY and 5 (5.88%) isolates carried qnrA and blaCMY. Antimicrobial susceptibility patterns of isolates were as follows: 49 (57.6%) exhibited resistance to Nalidixic acid and none of them to Ciprofloxacin. 33 (38.82%) isolates exhibited resistance to Cephalosporins and 2 (2.35%) of them exhibited ESBL phenotype and 12 (14.1%) isolates resistance to Ampicilin. These results were confirmed by MIC determination test as well. Having detected qnr and bla genes suggested that these genes spread antibiotic resistance among pathogenic bacteria.

关键词： QnrA QnrB QnrS ESBL (Extended-Spectrum Beta-Lactamase) BlaCMY

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