Streptococcus anginosusStreptococcusStreptococcus constellatusStreptococcus intermediusStreptococcal InfectionsViridans StreptococciStreptococcus pyogenesStreptococcus mutansStreptococcus pneumoniaeRNA, Ribosomal, 16SDNA, BacterialBacterial Typing TechniquesStreptococcus agalactiaeSequence Analysis, DNAAnti-Bacterial Agents