title: Virulence Factors of Staphylococcus aureus Isolated from Korean Pork bulgogi: Enterotoxin Production and Antimicrobial Resistance.
abstract: The aim of this study was to investigate the antimicrobial resistance profiles of and the enterotoxin gene distribution in 4 strains of Staphylococcus aureus (S10-2, S10-3, S12-2, and S13-2) isolated from 90 bulgogi samples. The S. aureus enterotoxin H gene (seh) was found in all the strains, while the S. aureus enterotoxin A gene (sea) was found only in 3 of the 4 strains. The S10-2 strain expressed a combination of enterotoxin genes - seg, seh, sei, sej, selm, and seln. The strains S10-2 and S13-2 were resistant to ampicillin and penicillin G, and all the isolated strains were resistant to tetracycline. The S10-2 strain was the only mecA-positive strain; it was also resistant to β-lactam antibiotics. Thus, genes encoding enterotoxin as well as those conferring antibiotic resistance were identified in the S. aureus strains isolated from pork bulgogi. These results represents the potential occurrence of MRSA in pork bulgogi, and the need for a monitoring system for pork bulgogi in order to prevent an outbreak of staphylococcal food poisoning.
authors.affiliation: Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 143-701, Korea.
authors.forename: Byeong Su
authors.initials: BS
authors.lastname: Jung
authors.affiliation: Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 143-701, Korea.
authors.forename: Yong Ju
authors.initials: YJ
authors.lastname: Lee
authors.affiliation: Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 143-701, Korea.
authors.forename: Na-Kyoung
authors.initials: NK
authors.lastname: Lee
authors.affiliation: Animal Products and Development division, National Institute of Animal Science, RDA, Suwon 441-706, Korea.
authors.forename: Hyoun Wook
authors.initials: HW
authors.lastname: Kim
authors.affiliation: Animal Products and Development division, National Institute of Animal Science, RDA, Suwon 441-706, Korea.
authors.forename: Mi-Hwa
authors.initials: MH
authors.lastname: Oh
authors.affiliation: Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 143-701, Korea; Bio/Molecular Informatics Center, Konkuk University, Seoul 143-701, Korea.
authors.forename: Hyun-Dong
authors.initials: HD
authors.lastname: Paik
keywords: Staphylococcus aureus; antibiotic susceptibility; enterotoxin; foodborne pathogen