title: Gut reaction to antigen.
mesh_terms: D000284:Administration, Oral; D000941:Antigens / Q000008:administration & dosage / Q000276:immunology*; D006801:Humans; D007070:Immunoglobulin A / Q000096:biosynthesis; D007413:Intestinal Mucosa / Q000276:immunology*; D010581:Peyer's Patches / Q000166:cytology; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000941:Antigens; D007070:Immunoglobulin A