[Clinical studies of streptococcal infections. 1) Hemolytic streptococci in upper respiratory tract].
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D006801:Humans; D012141:Respiratory Tract Infections / Q000382:microbiology*; D013290:Streptococcal Infections / Q000382:microbiology*; D013297:Streptococcus pyogenes / Q000302:isolation & purification*