BVD
Not sure how to control BVDV? Follow this testing framework!
BVD is an insidious and complex disease that presents specific management challenges to producers and veterinarians. In New Zealand management of BVD is voluntary and so any framework provided must reduce as many barriers to uptake as possible.
Our aim is to provide a BVD surveillance and testing protocol for vets to implement and work through with farmers which will facilitate the eradication of BVD on New Zealand dairy farms whilst offering the most efficient and economical solution for farmers.
BVD Dairy Framework
Biosecurity
If you are satisfied there are no PI’s in the herd it is important to implement biosecurity measures.
Testing/checking introductions
Bulls
Newborns
New animals brought in
Use IDEXX Antigen ELISA on ear notch samples to identify persistently infected animals. This can be conducted in situ using the IDEXX BVDV Ag Point-of-Care Test. Speak to your vet about using this test.
Trojans
In calf heifers brought onto the farm, or grazed off farm can become infected whilst pregnant. Whilst these animals will not test positive as a PI themselves, they can give birth to PI calves. This is why it is essential all calves are tested.
Vaccination
If there is a reasonable risk of exposure vaccinate mating cows and bulls to ensure maximum protection during mating and pregnancy. Bulk milk testing should be conducted at least one month after vaccination.
Boundaries
Prevent nose-to-nose contact through proper fencing (double/electric fencing).