title: [A comparative study between aztreonam and cefoperazone in respiratory tract infections].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001398:Aztreonam / Q000627:therapeutic use*; D002438:Cefoperazone / Q000627:therapeutic use*; D005260:Female; D006193:Haemophilus influenzae / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000188:drug therapy; D012141:Respiratory Tract Infections / Q000188:drug therapy* / Q000382:microbiology
chemical_list: D002438:Cefoperazone; D001398:Aztreonam