Only 12 herds kept BVD PIS over five weeks
BVD incidence halved in the past year, with only 0.05% out of more than two million calves tested in 2019 found to be persistently infected (PI).
The incidence was 0.1% in 2017. The PI calves were in 1% of 83,000 breeding herds tested (compared to 2% in 2017).
Furthermore, figures up to October 8 showed that only 53 PIS of the 1,115 born this year were still alive. The majority of these were born in August and September, but a small number were born earlier, the oldest being born in December 2017.
Only 12 herds were retaining PIS for more than five weeks after their initial test result. There are no PI animals alive in Louth, Dublin, Wicklow, Carlow and Wexford. A monthly map published by AHI (see animalhealthireland.ie) indicates where live PI animals are located.
The animalhealthireland.ie map which indicates where live PI animals are located.