Phenotypic and genotypic characterization of methicillin resistant Staphylococcus aureus.

Document Type : Original Article


1 Bacteriology, Mycology and Immunology Department, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt

2 Department of Microbiology and Immunology, National Research Center (NRC), Cairo, Egypt.


Food contaminated with multiple antibiotic-resistant S.aureus can be a major threat to the public health. The purpose of this study was to isolate S.aureus from different food sources, determine their antimicrobial susceptibility as well as detection of mecA gene among some resistant isolates. Out of 125 samples, 19 S.aureus isolates were isolated, and the antimicrobial susceptibility testing showed high resistance against kanamycin, penicillin G, oxacillin, erythromycin and tetracycline were the most resistant antimicrobials agents. All the tested isolates isolates were multiple drug resistant (MDR).Eight out of 19 isolates were phenotypically resistant to oxacillin as well as they were carriers for mecA gene.


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