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Journal of Kerman University of Medical Sciences، جلد ۲۵، شماره ۱، صفحات ۶۷-۷۶
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عنوان انگلیسی Prevalence of ermB Gene among Clinical Isolates of Staphylococcus aureus in Shahrekord, Iran
چکیده انگلیسی مقاله Background: Development of drug resistance to Staphylococcus aureus (S. aureus) has led to the use of older antibiotics such as macrolide-lincosamide-streptogramin B (MLSB) for the treatment of infections. MLSB resistance can be caused by several mechanisms, however, one of the predominant reasons is target modification mediated by erm genes.  The objective of this study is to determine the prevalence of erm genes and the frequency of constitutive MLSB (cMLSB), inducible MLSB (iMLSB), and MS phenotypes using D-test and polymerase chain reaction (PCR) methods. Methods:D-test was performed on 110 clinical specimens of S. aureus collected from Kashani and Hajar Hospitals in Shahrkord from October 2014 to May 2015. After sampling, DNA extraction was performed by simple boiling method and, in order to detect erm genes, multiplex PCR was carried out on erythromycin resistant isolates using specific primers. Results:The result of this study revealed that among 110 S. aureus isolates examined, 35 (31.8%) were MRSA and frequency of cMLSB, iMLSB, and MS resistant phenotypes were 22 (20%), 9 (8.2%), and 2 (1.8%), respectively. The genes ermA, ermB, and ermC were detected in 27 (24.5%), 28 (25.4%), and 26 (23.6%) isolates. Conclusion:This study demonstrated that cMLSB was the most common phenotype among isolated S. aureus. Moreover, another interesting point to notice in our study was the high frequency of the ermB gene in iMLSB resistant phenotypes.
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نویسندگان مقاله Kourosh Naderi |
Department of Microbiology, School of Medicine, Shahrekord University of Medical Sciences, Sharekord, Iran

Fahimeh Ghanbari |
Ph.D. student, Department of Genetic, School of Medicine, Shahid Saddoghi University of Medical Sciences, Yazd, Iran

Farzad Khademi |
Department of Microbiology, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran

Behnam Zamanzad |
Department of Microbiology, School of Medicine, Shahrekord University of Medical Sciences, Sharekord, Iran

نشانی اینترنتی http://jkmu.kmu.ac.ir/article_63178_8d75290448194e1a74ace62470ecbaac.pdf
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