title: Epidemiology of clinically significant isolates of Streptococcus pneumoniae in the United States.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D006801:Humans; D007223:Infant; D008875:Middle Aged; D011008:Pneumococcal Infections / Q000453:epidemiology*; D012703:Serotyping; D013296:Streptococcus pneumoniae / Q000145:classification*; D014481:United States