Specimens of cattle with bovine leukosis
In this study, we collected clinical data of 68 cattle which were diagnosed with bovine leukosis in the specific area in Hokkaido, Japan from 2016 to 2018, and analyzed the time intervals between parturition and the onset of bovine leukosis. The diagnosis was carried out by clinical veterinarians in Livestock Hygiene Service Center, Meat Inspection Center or Agricultural Mutual Aid Association in Hokkaido, Japan.