title: Gram negative colonization of the respiratory tract in postoperative patients.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000770:Anesthesia, Endotracheal; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D001419:Bacteria / Q000302:isolation & purification*; D001431:Bacteriological Techniques; D001437:Bacteriuria / Q000209:etiology; D005243:Feces / Q000382:microbiology; D006801:Humans; D008875:Middle Aged; D009666:Nose / Q000382:microbiology*; D010614:Pharynx / Q000382:microbiology*; D011183:Postoperative Complications; D012141:Respiratory Tract Infections / Q000209:etiology; D013183:Sputum / Q000382:microbiology*; D013514:Surgical Procedures, Operative; D013530:Surgical Wound Infection / Q000382:microbiology
chemical_list: D000900:Anti-Bacterial Agents