Carriage of group B streptococci in the upper respiratory tract.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D010612:Pharyngitis / Q000209:etiology; D012137:Respiratory System / Q000382:microbiology*; D012606:Scotland; D013292:Streptococcus agalactiae / Q000302:isolation & purification*