Members of the B. cereus group are spore-forming organisms commonly associated with spoilage of milk and dairy products. We have determined the genetic identity and growth characteristics of 57 B. cereus isolates collected from a Norwegian ice cream production plant. Our findings revealed persistence of B. cereus spp. strains for up to 19 months, suggesting the plant's susceptibility to long-term colonization. One of the mesophilic isolates, NVH-YM303, carried a complete cereulide synthetase operon. To assess the potential food poisoning risk associated with the presence of cereulide-producing strains in the production line, we examined the production of cereulide in ice cream and milk at different temperatures by NVH-YM303 and by the emetic psychrotrophic B. weihenstephanensis strain BtB2-4. Our findings revealed that NVH-YM303 produced higher levels of cereulide in ice cream as compared to milk. Furthermore, it was observed that NVH-YM303 produced more cereulide in ice cream at 25 degrees C compared to 15 degrees C. Conversely, BtB2-4 produced more cereulide in ice cream at 15 degrees C than at 25 degrees C. The results obtained in this study contribute to knowledge important for risk assessment of the potential hazards posed by the presence of B. cereus within ice cream production facilities.
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Korea Res Inst, Dept Food Safety & Distribut Res Grp, Wonju 55365, South KoreaKorea Res Inst, Dept Food Safety & Distribut Res Grp, Wonju 55365, South Korea
Park, Kyung-Min
Kim, Hyun-Jung
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Korea Res Inst, Dept Food Safety & Distribut Res Grp, Wonju 55365, South Korea
Korea Univ Sci & Technol, Dept Food Biotechnol, Daejeon 34113, South KoreaKorea Res Inst, Dept Food Safety & Distribut Res Grp, Wonju 55365, South Korea
Kim, Hyun-Jung
Park, Kee-Jai
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Korea Res Inst, Dept Food Safety & Distribut Res Grp, Wonju 55365, South KoreaKorea Res Inst, Dept Food Safety & Distribut Res Grp, Wonju 55365, South Korea
Park, Kee-Jai
Koo, Minseon
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Korea Res Inst, Dept Food Safety & Distribut Res Grp, Wonju 55365, South Korea
Korea Univ Sci & Technol, Dept Food Biotechnol, Daejeon 34113, South KoreaKorea Res Inst, Dept Food Safety & Distribut Res Grp, Wonju 55365, South Korea
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Univ Sadat City, Fac Vet Med, Dept Food Microbiol & Hyg, Sadat City, EgyptUniv Sadat City, Fac Vet Med, Dept Food Microbiol & Hyg, Sadat City, Egypt
Hammad, Ahmed M.
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Eltahan, Amira
Khalifa, Eman
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Matrouh Univ, Fac Vet Med, Dept Microbiol, Matrouh, EgyptUniv Sadat City, Fac Vet Med, Dept Food Microbiol & Hyg, Sadat City, Egypt
Khalifa, Eman
Abbas, Nasser H.
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Univ Sadat City, Genet Engn & Biotechnol Res Inst, Dept Environm Biotechnol, Sadat City, EgyptUniv Sadat City, Fac Vet Med, Dept Food Microbiol & Hyg, Sadat City, Egypt
Abbas, Nasser H.
Shimamoto, Tadashi
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Hiroshima Univ, Grad Sch Integrated Sci Life, Lab Food Microbiol & Hyg, 1-4-4 Kagamiyama, Higashihiroshima, Hiroshima 7398528, JapanUniv Sadat City, Fac Vet Med, Dept Food Microbiol & Hyg, Sadat City, Egypt
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Korea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South KoreaKorea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South Korea
Lee, Nari
Sun, Je Min
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Korea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South KoreaKorea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South Korea
Sun, Je Min
Kwon, Kyung Yoon
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Korea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South KoreaKorea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South Korea
Kwon, Kyung Yoon
Kim, Hyun Jung
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Korea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South KoreaKorea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South Korea
Kim, Hyun Jung
Koo, Minseon
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Korea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South KoreaKorea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South Korea
Koo, Minseon
Chun, Hyang Sook
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Korea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South KoreaKorea Food Res Inst, Food Safety Res Div, Songnam 463746, Gyeonggi, South Korea
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Natl Inst Infect Dis, Dept Vet Sci, Tokyo, JapanNatl Inst Infect Dis, Dept Vet Sci, Tokyo, Japan
Okutani, Akiko
Okugawa, Shu
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Univ Tokyo Hosp, Dept Infect Dis, Tokyo, JapanNatl Inst Infect Dis, Dept Vet Sci, Tokyo, Japan
Okugawa, Shu
Fujimoto, Fumie
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Univ Tokyo Hosp, Dept Infect Control & Prevent, Tokyo, JapanNatl Inst Infect Dis, Dept Vet Sci, Tokyo, Japan
Fujimoto, Fumie
Ikeda, Mahoko
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Univ Tokyo Hosp, Dept Infect Dis, Tokyo, JapanNatl Inst Infect Dis, Dept Vet Sci, Tokyo, Japan
Ikeda, Mahoko
Tsutsumi, Takeya
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Univ Tokyo Hosp, Dept Infect Dis, Tokyo, JapanNatl Inst Infect Dis, Dept Vet Sci, Tokyo, Japan
Tsutsumi, Takeya
Moriya, Kyoji
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Univ Tokyo Hosp, Dept Infect Dis, Tokyo, Japan
Univ Tokyo Hosp, Dept Infect Control & Prevent, Tokyo, Japan
Tokyo Healthcare Univ, Tokyo, JapanNatl Inst Infect Dis, Dept Vet Sci, Tokyo, Japan
Moriya, Kyoji
Maeda, Ken
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Natl Inst Infect Dis, Dept Vet Sci, Tokyo, JapanNatl Inst Infect Dis, Dept Vet Sci, Tokyo, Japan