[1] Kirin Co Ltd, Div Res & Dev, Cent Labs Key Technol, Kanazawa Ku, Yokohama, Kanagawa 2360004, Japan
[2] Gifu Univ, United Grad Sch Vet Sci, Gifu 5011193, Japan
[3] Natl Inst Hlth Sci, Div Microbiol, Setagaya Ku, Tokyo 1588501, Japan
[4] Iwate Univ, Fac Agr, Dept Vet Med, Morioka, Iwate 0208550, Japan
[5] Azabu Univ, Grad Sch Life & Environm Sci, Dept Food & Life Sci, Lab Food Hyg,Chuo Ku, Sagamihara, Kanagawa 2525201, Japan