Infectious Disease Surveillance and Management
For dairy herds, several infectious diseases can be detected using a simple bulk milk sample. These include BVD, IBR, Leptospirosis, Schmallenberg and Liver Fluke. Some tests look only for antibodies to a disease and so vaccination can affect the results. For BVD, we can test for the actual virus (antigen) and for herds vaccinated with a marker IBR vaccine, we can test for wild type IBR.
For beef herds, it is useful to blood sample a group of young-stock (usually 3-12 months of age) for infectious diseases including BVD, IBR and Leptospirosis every year. This can be done at the same time as your annual TB test.