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Table 1 Number of cows, average ± standard deviation of anti- O. ostertagi antibody levels in individual milk before treatment registration and distribution of breed, lactation number and year quarter of calving in the treated and untreated group

From: Non-invasive indicators associated with the milk yield response after anthelmintic treatment at calving in dairy cows

Parameter Eprinomectin Control
Number of cows 234 243
Anti- O. ostertagi antibody level (ODR) 0.49 ± 0.3 0.52 ± 0.3
Breed (%):   
Holstein Friesian 43 46
Other 6 5
Lactation number (%):   
First 14 12
Second 13 13
Third or higher 26 22
Year quarter:   
Jan - Mar 10 14
Apr - Jun 13 8
Jul - Sep 13 12
Oct - Dec 15 15