From: Herd and within-herd BoHV-1 prevalence among Irish beef herds submitting bulls for entry to a performance testing station
Variable
Range
25% Quartile
Median
75% Quartile
Herd size
5-320
33
55
104
Number sampled per herd
5-50
20
29
36
Number of animals bought in 2007
0-51
1
3
12
Number of contiguous herds
2-50
8
16.5