Streptococcus pneumoniae in chronic bronchitis.
D001991:Bronchitis / Q000382:microbiology*; D003550:Cystic Fibrosis / Q000382:microbiology*; D006801:Humans; D011014:Pneumonia / Q000209:etiology*; D012621:Seasons; D013183:Sputum / Q000382:microbiology*; D013290:Streptococcal Infections