総 説 口蹄疫ウイルスと口蹄疫の病性について 村 上 洋 介 農林水産省家畜衛生試験場ウイルス病研究部病原ウイルス研究室長 Foot-and-Mouth Disease Virus and the Disease Nature by the Virus Yosuke MURAKAMI National Institute of Animal Health, Tsukuba, Ibaraki 305-0856, Japan Foot-and-mouth disease (FMD) affects all cloven-hoofed animals and is considered the most infectious of all animal diseases. It is endemic in many countries of the world, including Africa