Endocarditis, Subacute BacterialEndocarditis, BacterialEndocarditisStreptococcus sanguisStreptococcal InfectionsHeart Valve DiseasesHeart ValvesHeart Valve ProsthesisViridans StreptococciStaphylococcal InfectionsAortic ValveStreptococcusBordetella aviumAbscessSurgery, OralMitral ValveStaphylococcus hominisSplenic DiseasesAneurysm, InfectedAnti-Bacterial AgentsAortic Valve InsufficiencyTeicoplaninGram-Positive Bacterial InfectionsTricuspid ValveHeart Valve Prosthesis ImplantationStaphylococcusAntibiotic ProphylaxisPenicillin GPenicillinsRheumatoid FactorHeart Septal Defects, VentricularStreptomycinEchocardiography, TransesophagealArthritis, InfectiousEchocardiographyStaphylococcus aureusRabbitsProsthesis-Related InfectionsEnterococcus faecalisPostoperative Complications