Pathogen infection in the gut induces an accumulation of GALT IgT+ B cells and the secretion of specific IgT in the gut mucus.
Intestinal microbiota is coated by secretory immunoglobulins, which are transported to the gut lumen by pIgR receptors.
The induction of mucosal immunoglobulin response upon vaccination is largely unknown.
The key roles of mucosal B lymphocytes in intestinal homeostasis are conserved throughout evolution.