1. Aichi Prefectural Seibu Livestock Hygiene Service Center, Owari branch, 8–2673–5 Shinogi-cho, Kasugai, Aichi 486–0851, Japan
2. Aichi Prefectural Chuo Livestock Hygiene Service Center, 1–306 Azajizouno, Miai-cho, Okazaki, Aichi 444–0805, Japan
3. Aichi Prefectural Agricultural Research Center, 1–1 Yazakosagamine, Nagakute, Aichi 480–1193, Japan
4. Division of Bacterial and Parasitic Diseases, National Institute of Animal Health, National Agriculture and Food Research Organization, 3–1–5 Kannondai, Tsukuba, Ibaraki 305–0856, Japan
5. The United Graduate School of Veterinary Sciences, Gifu University, 1–1 Yanagido, Gifu, Gifu 501–1193, Japan