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KMID : 1007520130220041153
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Food Science and Biotechnology
2013 Volume.22 No. 4 p.1153 ~ p.1159
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Prevalence and Characterization of Staphylococcus aureus Pathogenic Factors Isolated from Korean Rice Cakes
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Cho Yong-Sun
Wang Hae-Jin
Lee Joo-Young
Lee Da-Yeon
Shin Dong-bin
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Abstract
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Staphylococcus aureus is a major human pathogen that produces a wide array of toxins, leading to various disease symptoms. The prevalence of S. aureus in rice cakes was investigated from 2006 to 2011. S. aureus was isolated from 79 of 1,151 (6.9%) rice cake samples collected in Korea, and the prevalence of S. aureus contamination was found to be highest in jeolpyeon (stramed rice cake). Of the tested strains showing antibiotic resistance properties, 15 strains (19.0%) showed multiple antibiotic resistance and 3 showed both mec A positive and oxacillin resistance. In total, 67.1% of the tested strains showed 1 or more enterotoxin genes and 11.4% showed the tst gene. Most of the enterotoxigenic strains produced SEA or SEA in combination with another toxin. Total typing using automated repetitive-sequence-based PCR revealed that the 79 S. aureus isolates could be grouped into 13 distinct clusters. S. aureus showed different fingerprint patterns although some of the patterns carried the same type of SE genes and antibiotic resistance.
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KEYWORD
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rice cake, Staphylococcus aureus, antibiotic resistance, enterotoxin, repetitive-sequence-based PCR
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