CD79A and infection: In that study, these resistant ewes showed higher IgA levels in serum at day 3 post-infection (p < 0.05) and close to significance at day 21 pi (p = 0.06); moreover, a strong negative correlation between cFEC and specific IgA was only significant in resistant ewes at day 3 pi (r =− 0.870; p < 0.05), but absent in susceptible ones.