Beta-hemolytic streptococci in seliva.
D002353:Carrier State / Q000382:microbiology; D002648:Child; D006461:Hemolysis; D006801:Humans; D010612:Pharyngitis / Q000382:microbiology; D012463:Saliva / Q000382:microbiology*; D013291:Streptococcus / Q000302:isolation & purification*