Indeed, IgA+ B cells were significantly increased in the jejunum draining MLN of day 14 infected pigs (Figure 5B, several jejunal LN were pooled per individual). Strikingly, the IgA response associated with the infection was far stronger in ileal LN (Figure 5C). Furthermore, B cells derived from the jejunum MLN at day 35 post infection did not comprise higher proportions of IgA class switched B cells anymore (Figure 5D), indicating that the IgA responses seen at day 14 ceased within the following weeks in a primary infection. Here, CD79A is linked to infection.