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KMID : 0665220200330020142
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Korean Journal of Food and Nutrition
2020 Volume.33 No. 2 p.142 ~ p.148
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Prevalence and Toxin Characteristics of Bacillus cereus Isolated from Vegetables in Gwangju Metropolitan City
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Cho Sun-Ju
Jeong So-Hyang
Seo Yu-Jin
Kim Tae-Sun
Lee Hyang-Hee
Lee Min-Gyou
Seo Jung-Mi
Cho Bae-Sik
Kim Jung-Beom
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Abstract
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The purpose of this study was to investigate the prevalence, toxin gene profiles, and enterotoxin producing ability of Bacillus cereus isolated from environment-friendly vegetables and good agricultural practices (GAP) vegetables. A total of 49 vegetables including 40 environment-friendly vegetables and 9 GAP vegetables were tested. The Vitek 2 system was used to identify B. cereus and the PCR was used to detect 6 toxin genes, respectively. B. cereus was detected in 34 (69.3%) of 49 vegetables and the prevalence of B. cereus in GAP vegetables (44.4%) was lower than in the environment-friendly vegetables (75.0%). The detection rates of entFM, nheA, hblC, and cytK enterotoxin genes, respectively, among all isolates were 100%, 97.0%, 88.2%, and 73.5%, respectively. All of the isolates had at least one or more enterotoxin gene and 20 isolates (58.8%) had hemolysin BL enterotoxin producing ability. The risk of food poisoning from the environment-friendly vegetables and the GAP vegetables has been shown as constant. Thus, it is necessary to expand the supply of GAP vegetables showing lower B. cereus contamination than the environment-friendly vegetables. The characteristics of the environment-friendly vegetables and the GAP vegetables that must be consumed after cleaning should be disseminated to consumers regarding food poisoning prevention.
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KEYWORD
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environment-friendly vegetables, GAP, Bacillus cereus, contamination, toxin
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