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Molecular detection of methicillin-resistant Staphylococcus aureus isolated from different foodstuffs in Egypt

Document Type : Original Article

Authors

Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh, Egypt

Abstract

Methicillin-resistant Staphylococcus aureus (MRSA) infection is a major public health problem. Therefore, this study was aimed to estimate the prevalence of MRSA in various food products. A total number of 204 food samples including raw milk (n = 30), cheese (n = 60), chicken (n = 25), beef (n = 24) and fish (n = 65) were collected from August to November of 2021 within different localities in Kafr El-Sheikh governorate, the northern region of Egypt. All samples were assessed through a series of bacteriological and biochemical techniques to identify MRSA. Out of 204 samples, 52(25.49%) isolates were presumptively identified as MRSA on oxacillin resistance screening agar base media. Of these 52 isolates, 17(32.69%) were characterized as coagulase-positive. For the molecular confirmation of MRSA, all isolates were subjected to polymerase chain reaction assays to detect mecA and mecC. In addition, mecA was identified in all the isolates (100%), whereas, none was positive for mecC. Therefore, based on the detection of mecA, the overall occurrence rate of MRSA among the samples was 8.33%. The isolates were also subjected to antimicrobial susceptibility tests. Cefoxitin, cefuroxime, oxacillin and amoxicillin-clavulanic acid were completely resistant (100%) to the isolates, however, susceptible to vancomycin and ciprofloxacin. Raw milk had the highest prevalence of MRSA (13.30%), followed by chicken (12.00%), fish (9.20%), cheese (5.00%) and beef (4.20%). Due to the possibility of transmission of these strains to humans, the high prevalence of MRSA in various foodstuffs in Egypt poses a potential public health risk.

Keywords

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Veterinary Research Forum
Volume 14, Issue 5
May 2023
Pages 243-248
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History
  • Receive Date: 04 April 2022
  • Revise Date: 10 May 2022
  • Accept Date: 27 June 2022
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