Beta-haemolytic streptococci in the throat: carrier rates in schoolchildren.
D000293:Adolescent; D000367:Age Factors; D002353:Carrier State / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D010614:Pharynx / Q000382:microbiology*; D012606:Scotland; D012621:Seasons; D013291:Streptococcus / Q000302:isolation & purification*; D014068:Tonsillectomy