[Yearly epidemiological survey of group A-hemolytic streptococci isolated from throat of healthy children. Part I Analysis by M type (author's transl)].
D002648:Child; D006801:Humans; D010614:Pharynx / Q000382:microbiology*; D012541:Scarlet Fever / Q000382:microbiology; D013297:Streptococcus pyogenes / Q000302:isolation & purification*; D013997:Time Factors