Fig. 3From: Comparison of diagnostic methods for assessment of Ostertagia ostertagi exposure in Norwegian dairy herdsDistribution of (a) individual serum (n = 374) and (b) individual milk (n = 194) ODR values according to four categories of bulk tank milk (BTM) using an indirect antibody ELISA for Ostertagia ostertagi in 20 herds in NorwayBack to article page