carrying a PI calf were significantly higher compared to colostrum collected from heifers that were not
carrying a PI calf for dilutions of 1:100 (p < 0.05), 1:200 (p < 0.01), and 1:500 (p < 0.01) (Table 1).
For undiluted and 1:5 diluted colostrum, the median ELISA S/P ratio for colostrum samples collected
from heifers carrying and not carrying PI calves did not differ significantly (Table 1).