CD79A and infection: In the laboratory, mice on a supplemented diet had both significantly higher total faecal IgA 2–4 weeks post-infection (β = 2.40, p = 0.018) and H. polygyrus-specific IgG1 after three weeks post-infection (β = 0.20, p < 0.001, figure 4d,e; electronic supplementary material, table S8).