title: The bacteriology of chronic bronchitis.
mesh_terms: D001991:Bronchitis / Q000382:microbiology*; D002908:Chronic Disease; D006193:Haemophilus influenzae / Q000302:isolation & purification*; D006801:Humans; D013183:Sputum / Q000382:microbiology; D013296:Streptococcus pneumoniae / Q000302:isolation & purification