title: Serum and secretory antibodies in patients with chronic bronchitis.
mesh_terms: D000328:Adult; D000368:Aged; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D000917:Antibody Formation; D001991:Bronchitis / Q000097:blood / Q000188:drug therapy / Q000276:immunology*; D002908:Chronic Disease; D005455:Fluorescent Antibody Technique; D006193:Haemophilus influenzae / Q000276:immunology; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D007136:Immunoglobulins / Q000032:analysis*; D008875:Middle Aged; D012463:Saliva / Q000032:analysis; D013183:Sputum / Q000032:analysis; D013291:Streptococcus / Q000276:immunology
chemical_list: D000900:Anti-Bacterial Agents; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007136:Immunoglobulins