title: [External secretory fluid and local immunity mechanism].
mesh_terms: D000818:Animals; D002850:Chromatography, Gel; D004432:Ear, Middle / Q000378:metabolism*; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis*; D010306:Parotid Gland / Q000378:metabolism; D011817:Rabbits / Q000276:immunology; D012463:Saliva / Q000276:immunology*
chemical_list: D007070:Immunoglobulin A