Figure 3. Modeling of metabolic health in dependence of earlier anti-C. pecorum immunity.

Predictive modeling by principal component and cluster analysis of plasma albumin and globulin in week 15 of each animal combined with the corresponding anti-C. pecorum IgM 8 weeks earlier in week 7 generated two PCs with a combined r² of 0.82. Two clusters of calves were termed low (n = 34) or high responders (n = 17) based on the values for each PC.