[1] Azabu Univ, Sch Vet Med, Dept Vet Microbiol, Chuo Ku, Sagamihara, Kanagawa 2525201, Japan
[2] Fujimura Anim Hosp, Osaka 6520022, Japan
[3] RIKEN, Res Ctr Allergy & Immunol, Tsurumi Ku, Yokohama, Kanagawa 2300045, Japan
[4] Univ Wisconsin, Sch Vet Med, Dept Med Sci, Madison, WI 53706 USA
[5] Nippon Zenyaku Kogyo Co Ltd, Koriyama, Fukushima 9630196, Japan