title: Biologic significance of the secretory  A immunoglobulins.
mesh_terms: D000906:Antibodies / Q000032:analysis; D000917:Antibody Formation; D000936:Antigen-Antibody Complex; D001183:Arthus Reaction / Q000209:etiology* / Q000276:immunology; D002850:Chromatography, Gel; D004064:Digestive System / Q000276:immunology*; D005455:Fluorescent Antibody Technique; D006968:Hypersensitivity, Delayed / Q000209:etiology* / Q000276:immunology; D007109:Immunity; D007114:Immunization / Q000009:adverse effects*; D007122:Immunoelectrophoresis; D007070:Immunoglobulin A / Q000502:physiology; D007136:Immunoglobulins / Q000502:physiology*; D009093:Mucus / Q000276:immunology; D009500:Neutralization Tests; D009666:Nose / Q000276:immunology; D012137:Respiratory System / Q000276:immunology*; D012141:Respiratory Tract Infections / Q000276:immunology; D014566:Urogenital System / Q000276:immunology*; D014777:Virus Diseases / Q000276:immunology
chemical_list: D000906:Antibodies; D000936:Antigen-Antibody Complex; D007070:Immunoglobulin A; D007136:Immunoglobulins