AbiotrophiaStreptococcaceaeCarnobacteriaceaeLactobacillaceaeGemellaEndocarditis, BacterialGram-Positive Bacterial InfectionsStreptococcusRNA, Ribosomal, 16SGenes, rRNAMouthDNA, RibosomalBacteremiaPhylogenyGenetic HeterogeneityStreptococcal InfectionsPolymerase Chain ReactionPolymorphism, Restriction Fragment LengthBacterial Typing TechniquesDNA, BacterialMolecular Sequence DataSequence Homology, Nucleic AcidSequence Analysis, DNABase SequenceAbscessEndocarditisVenous InsufficiencyEndocardiumHeart ValvesHeart Valve Diseases