[Epidemiological investigation on group A streptococci from the pharynx of school children in a rural community].
D002648:Child; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D010614:Pharynx / Q000382:microbiology*; D013297:Streptococcus pyogenes / Q000302:isolation & purification*