1. Kagoshima Central Livestock Hygiene Service Center, 1678 Yuda, Higashiichiki, Hioki, Kagoshima 899-2201, Japan
2. Hiroshima Western Livestock Hygiene Service Center, 1-15 Saijogojo, Higashi-Hiroshima, Hiroshima 739-0013, Japan
3. Fukuoka Chuo Livestock Hygiene Service Center, 4-14-5 Hakozakifuto, Higashi-ku, Fukuoka 812-0051, Japan
4. Division of Bacterial and Parasitic Disease, National Institute of Animal Health, National Agriculture and Food Research Organization, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan