title: Deficiency of IgA in serum and respiratory secretions.
mesh_terms: D000293:Adolescent; D001980:Bronchi / Q000378:metabolism; D002648:Child; D002675:Child, Preschool; D005260:Female; D005916:Globulins; D006801:Humans; D007109:Immunity; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D007153:Immunologic Deficiency Syndromes; D008297:Male; D009297:Nasal Mucosa / Q000378:metabolism; D010306:Parotid Gland / Q000378:metabolism; D012137:Respiratory System / Q000378:metabolism*; D012463:Saliva / Q000032:analysis; D012712:Serum Globulins
chemical_list: D005916:Globulins; D012712:Serum Globulins