title: Beta-hemolytic streptococci grouping and group A typing in Ribeirão Preto, S.P., Brazil, 1966-1970.
mesh_terms: D001938:Brazil; D005260:Female; D006801:Humans; D008297:Male; D012621:Seasons; D012703:Serotyping; D013290:Streptococcal Infections / Q000453:epidemiology*; D013297:Streptococcus pyogenes / Q000302:isolation & purification*