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This study determined the presence of antimicrobial resistance genes among Staphylococcus aureus isolated from pork meat in Ho Chi Minh City, Vietnam.
A total of 152 pork samples were collected in markets and supermarkets in Ho Chi Minh City. Antimicrobial susceptibility of the isolates to antimicrobial agents was determined. Isolates which were resistant against oxacillin, ampicillin and/or penicillin, gentamicin and/or kanamycin, tetracycline, erythromycin and clindamycin were tested for mecA, blaZ, aacA-aphD, tetM, msrA and linA, respectively.
blaZ genes were detected with a high percentage among S. aureus isolates from pork (98.48%). Although mecA was not found among 6 oxacillin-resistant isolates these isolates carried blaZ gene and were resistant against up to nine antibiotics. aacA-aphD encoded resistance to gentamicin, kanamycin, tobramycin and amikacin. While it was reported in 100% (Strommenger et al, 2003) and 28% (Nakaminam et al, 2008) of S. aureus in previous studies it was detected in only 21.6% of the tested isolates. One fourth of tetracycline-resistant S. aureus isolates contained tetM gene encoding for resistance to all tetracyclines, including minocycline.
VT Tra An, DT Xuan Thiep, AC Fluit. Antimicrobial resistance genes of S. aureus from pork. Proceedings of the 23rd IPVS Congress. 2014.