title: Commensal or pathogen?--The growing dilemma facing the general practitioner.
mesh_terms: D000368:Aged; D001991:Bronchitis / Q000150:complications / Q000382:microbiology*; D005194:Family Practice; D006190:Haemophilus / Q000302:isolation & purification; D006193:Haemophilus influenzae / Q000201:enzymology / Q000302:isolation & purification; D006801:Humans; D007223:Infant; D008173:Lung Diseases, Obstructive / Q000150:complications; D009343:Neisseria / Q000201:enzymology / Q000302:isolation & purification; D009520:New Zealand; D009960:Oropharynx / Q000382:microbiology*; D010325:Pasteurella / Q000302:isolation & purification; D011014:Pneumonia / Q000382:microbiology; D013296:Streptococcus pneumoniae / Q000302:isolation & purification; D001618:beta-Lactamases / Q000096:biosynthesis
chemical_list: D001618:beta-Lactamases