title: Gut reaction to antigen.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000941:Antigens / Q000008:administration & dosage*; D002417:Cattle; D007070:Immunoglobulin A / Q000096:biosynthesis; D007422:Intestines / Q000276:immunology*; D051379:Mice; D051381:Rats
chemical_list: D000941:Antigens; D007070:Immunoglobulin A