title: Group B streptococci (GBS) in the upper respiratory tract of schoolchildren.
mesh_terms: D000293:Adolescent; D002353:Carrier State / Q000382:microbiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D012137:Respiratory System / Q000382:microbiology*; D012606:Scotland; D013292:Streptococcus agalactiae / Q000302:isolation & purification*