BVD Vaccination

摘要

The first BVD eradication schemes, on a national basis, were started in Scandinavia in the early 1990s. They were based on improving biosecurity and identifying the key role of the PI in the spread of disease. The development of diagnostic tests, principally bulk tank milk antibody testing and antigen capture ELISA, was essential to the success of the scheme. These schemes were compulsory and vaccination was banned. In countries or areas where control of BVD is not compulsory, however and, particularly where there is a high density of cattle (and BVDV) or a large number of cattle movements, there are significant risks to an eradication policy, as herds which have effectively used a test-and-cull policy will have a large number of animals which are susceptible to BVDV. If the virus is re-introduced, then severe consequences could result. In such cases vaccination, in addition to test-and-cull, has the significant benefit of reducing the economic impact of BVD, without increasing herd susceptibility.