PharyngitisStreptococcal InfectionsStreptococcus pyogenesPenicillin VRheumatic FeverTonsillitisPharynxCephalexinPenicillin G BenzathineAnemia, HemolyticRheumatic Heart DiseaseStreptococcusAcute DiseaseAnti-Bacterial AgentsPenicillinsAntigens, BacterialBacteriological TechniquesAnemia, Hemolytic, AutoimmuneHemolysisSensitivity and SpecificityHemolytic AgentsAnemia, Hemolytic, Congenital