From: Aspects of bovine herpesvirus 1 and bovine viral diarrhoea virus herd-level seroprevalence and vaccination in dairy and beef herds in Northern Ireland
Herd size
Herd level serological classification %
BoHV-1 negative
BoHV-1 positive
BVDV negative
BVDV positive
Q1
37.1
62.9
3.5
96.5
Q2
23.1
76.9
1.0
99.0
Q3
17.3
82.7
0
100
Q4
8.6
91.4
1.9
98.1
p < 0.01
p = 0.22