This spring, in our practice in south Wexford, we have seen a number of herds presenting with persistently infected (PI) Bovine Viral Diarrhoea (BVD) calves. This is disappointing in the fourth year of the BVD eradication programme.

The virus can cause a host of issues from subclinical infections where no clinical signs are apparent to diarrhoea, immuno-suppression, infertility, embryo loss, abortions and deformities.