title: A comparative trial of ampicillin, tetracycline and a combination of trimethoprim and sulphamethoxazole in the treatment of respiratory infections.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000667:Ampicillin / Q000627:therapeutic use; D004357:Drug Synergism; D005260:Female; D005493:Folic Acid Antagonists / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011743:Pyrimidines / Q000627:therapeutic use*; D012141:Respiratory Tract Infections / Q000188:drug therapy*; D013420:Sulfamethoxazole / Q000627:therapeutic use*; D013752:Tetracycline / Q000627:therapeutic use
chemical_list: D005493:Folic Acid Antagonists; D011743:Pyrimidines; D000667:Ampicillin; D013752:Tetracycline; D013420:Sulfamethoxazole