title: Endogenic defense against infectious disease in chronic bronchitis.
mesh_terms: D001980:Bronchi / Q000378:metabolism*; D001991:Bronchitis / Q000276:immunology*; D002908:Chronic Disease; D006801:Humans; D007109:Immunity; D007136:Immunoglobulins; D007372:Interferons; D009092:Mucous Membrane / Q000378:metabolism*; D009113:Muramidase; D009895:Opsonin Proteins; D010587:Phagocytosis; D011414:Properdin; D013183:Sputum / Q000201:enzymology / Q000276:immunology
chemical_list: D007136:Immunoglobulins; D009895:Opsonin Proteins; D011414:Properdin; D007372:Interferons; D009113:Muramidase