A previous study using weaned pigs challenged with enterotoxigenic E. coli, demonstrated that 0.05% of β‐glucan derived from yeast reduced IgA and IgG in serum, and IgA in jejunum, which could suggest that the exposure of β‐glucan to antigen‐presenting cells could equip the immune system to control infections more efficiently (Stuyven et al. 2009). Here, CD79A is linked to infection.