title: Antibiotic regimens in severe and acute purulent exacerbations of chronic bronchitis.
mesh_terms: D000368:Aged; D000667:Ampicillin / Q000627:therapeutic use*; D001991:Bronchitis / Q000188:drug therapy*; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D006801:Humans; D008297:Male; D008875:Middle Aged; D010406:Penicillins / Q000627:therapeutic use*; D010919:Placebos; D013183:Sputum / Q000382:microbiology; D013307:Streptomycin / Q000627:therapeutic use*; D013492:Suppuration; D013752:Tetracycline / Q000627:therapeutic use*
chemical_list: D010406:Penicillins; D010919:Placebos; D000667:Ampicillin; D013752:Tetracycline; D013307:Streptomycin