title: Detection and importance of beta lactamase producing "non-pathogens" in patients with chronic obstructive airways disease.
mesh_terms: D000667:Ampicillin / Q000627:therapeutic use; D001419:Bacteria / Q000302:isolation & purification*; D006193:Haemophilus influenzae / Q000201:enzymology; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000188:drug therapy / Q000382:microbiology*; D001618:beta-Lactamases / Q000096:biosynthesis*
chemical_list: D000667:Ampicillin; D001618:beta-Lactamases