[Streptococcal infections: a serological survey in a student population].
D002353:Carrier State; D002648:Child; D005260:Female; D006801:Humans; D007558:Italy; D008297:Male; D013290:Streptococcal Infections / Q000097:blood / Q000453:epidemiology*; D013297:Streptococcus pyogenes
Le infezioni streptococciche: rilievi sierologici in collettivita' scolari.