Rheumatic FeverRheumatic Heart DiseaseRheumatic DiseasesChoreaStreptococcus pyogenesPharyngitisAntistreptolysinFeverStreptococcal InfectionsHeartPenicillin G BenzathineGrenadaHeart DiseasesAcute DiseaseNorthern TerritoryHeart Valve DiseasesMyocarditisHeart RateHeart Defects, CongenitalRheumatic NoduleCoronary DiseasePyodermaQ FeverStreptococcal VaccinesScarlet FeverHeart ValvesOceanic Ancestry GroupStreptococcusMitral Valve InsufficiencyHeart FailureAntigens, BacterialAortic Valve InsufficiencyHeart MurmursAdams-Stokes SyndromeMitral Valve StenosisArthritis, ReactiveYellow FeverTyphoid FeverNew CaledoniaRisk FactorsMyocardial IschemiaPenicillinsInternational Council of NursesGlomerulonephritisMitral ValveBacterial Outer Membrane ProteinsEchocardiographyFever of Unknown OriginProspective StudiesFollow-Up StudiesAntibodies, BacterialArthritisRecurrence