title: Colonization of the respiratory tract by gram-negative bacilli in hospitalized patients.
mesh_terms: D000328:Adult; D000368:Aged; D001419:Bacteria / Q000254:growth & development; D001431:Bacteriological Techniques; D003428:Cross Infection / Q000382:microbiology*; D005243:Feces / Q000382:microbiology; D006801:Humans; D001239:Inhalation; D008875:Middle Aged; D009297:Nasal Mucosa / Q000382:microbiology; D010614:Pharynx / Q000382:microbiology; D012141:Respiratory Tract Infections / Q000382:microbiology*; D013183:Sputum / Q000382:microbiology; D013997:Time Factors; D014132:Trachea / Q000382:microbiology; D014556:Urine / Q000382:microbiology