Prevalence of Bovine Leukemia Virus Antibodies in US Dairy Cattle

Table 2

Characteristics of enrolled herds from survey results; s.d.: standard deviation; i.q.r.: interquartile range.

Survey response rate (n)		82.5 (85)
Closed herd (No heifers, cows, or bulls added to the herd in the last 12 months)		64.7
Type of milking facilities	Parlor or Rotary	77.7
	Stanchion or Tie-stall	18.8
	Robotic	2.4
	Other	1.2
Pasture ever used		51.8
For herds using pasture (n=43): Number of months used	Mean (s.d.)	7.7 (2.8)
	Median (i.q.r.)	6 (6.0)
	Range	4 – 12
Testing for BLV (At least 1 animal/year)		12.9
Perception of BLV as a problem within the herd (n=80)	“It is not a problem”	47.5
	“It is a problem, but not significant”	41.3
	“It is a significant problem, but not one of the biggest problems in this herd”	10.0
	“It is one of the biggest problems in the herd”	1.3