From: Bulk milk ELISA and the diagnosis of parasite infections in dairy herds: a review
Country
Number of herds pastured/total
Mean ODR
Reference
Denmark
146/146
0.48
[29]
Germany
78/131
Italy
47/140
0.31
Netherlands
243/288
0.45
Portugal
92/163
0.61
Spain
91/143
0.53
UK/Ireland
142/174
0.60