Bovine hemoparasitic diseases and their control
1991
Minami, T. (National Inst. of Animal Health, Tsukuba, Ibaraki (Japan))
Bovine hemoparasitic diseases in the world an strategies against theileriosis in Japan were reviewed. Anaplasmosis, eperythrozoonosis, cowdriosis and ehrlichiosis caused by rickettsia and trypanosomiasis, babesiosis and theileriosis caused by protozoa were listed up, and the progress of up-to-date research on them was discussed. Particularly anaplamosis, cowdriosis, trypanosomiasis, babesios and theileriosis are still big problems in tropic and subtropic regions. Regarding an agent of benign theileriosis in Asia, comparative studies among strains of Theileria sergenti / buffeli / orientalis are under way to find precise identification. the presence of antigenic diversities is also common to Anaplasma, Trypanosoma, Babesia and Theileria species. The strain characterization has been carried out using various kinds of new diagnostic techniques, e.g., monoclonal indirect fluorescent antibody test, immunoblotting test, two dimensional gel electrophoresis, DNA probe test, etc. With the purpose of developing a safe and effective vaccine against hemoparasitic diseases, the new biotechnologies are applied to the study of these diseases. In Japan theileriosis caused by T. sergenti is a big barrier in developing grazing programmes. At present, immunochemical studies are intensified at domestic laboratories. Until such time as an effective vaccine is developed, the application of currently available methods will be essential to reduce the risk of the disease
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