Rheumatic Heart DiseaseRheumatic FeverRheumatic DiseasesHeart Valve DiseasesChronic DiseasePenicillin G BenzathineNorthern TerritoryStreptococcus pyogenesHeart ValvesHeart DiseasesPharyngitisEthnologyStreptococcal InfectionsInternational Council of NursesHeartMitral Valve StenosisHeart AuscultationHeart Defects, CongenitalCrowdingMitral ValveEndocarditisStreptococcal VaccinesMolecular MimicryNew MexicoMyocarditisRisk FactorsOceanic Ancestry GroupSudanEchocardiographyHeart RatePrevalenceAntigens, BacterialDeveloping CountriesEndocarditis, BacterialIndiaHeart Valve ProsthesisUgandaMitral Valve InsufficiencyAtrial FibrillationCoronary DiseaseSouth AfricaStreptococcusBacterial Outer Membrane ProteinsAcute DiseaseMyocardiumFollow-Up StudiesProspective StudiesHeart Valve Prosthesis ImplantationAortic ValveRetrospective Studies