MIF and infection: Our assumption about the presence of a mixed infection, specifically, in the herd group (BTM), was fortified when a Pearson analysis explained a moderate and low positive correlation between antibody reactivity against L3P and L5P at the herd (BTM; (r (45) = 0.5, p = 0.00039) and individual levels (MIF; (r (79) = 0.37, p = 0.00059), respectively.