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Target cattle age of post-slaughter testing for bovine spongiform encephalopathy and infectivity entering the human food chain in Japan |
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| Authors: | Kosuke Kiyohara Shuji Hashimoto Takashi Kawamura Toshiyuki Hamasaki Shigeki Yamamoto Masayuki Kakehashi Yasuhiro Yoshikawa |
| Affiliation: | aKyoto University Health Service, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan;bDepartment of Hygiene, Fujita Health University School of Medicine, 1-98, Kutsukake-cho, Toyoake, Aichi 470-1192, Japan;cDivision of Biomedical Food Research, National Institute of Health Sciences, 1-18-1, Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan;dInstitution of Health Sciences, Hiroshima University Faculty of Medicine, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan;eDepartment of Biomedical Science, University of Tokyo Graduate School of Agricultural and Life Sciences, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan |
| Abstract: | A model of possible outcomes of bovine spongiform encephalopathy (BSE)-infected cattle in Japan was constructed, and the expected proportion of BSE-infected cattle entering the human food chain and the expected infectivity remaining in edible meat per capita by breed variety and sex were calculated, while changing target ages of BSE testing. As widely accepted, BSE testing for all ages could reduce the proportion of infected cattle entering the human food chain and their infectivity. It was especially effective among female dairy cattle, but the resulting reduction was quite limited. The effectiveness of BSE testing on food safety hardly differs between the target age of  21 months and all ages. |
| Keywords: | Probabilistic model Bovine spongiform encephalopathy surveillance in Japan Food safety |
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