Bacteria, AnaerobicBacteriaGram-Negative Anaerobic BacteriaAnaerobiosisBacteria, AerobicFusobacteriumPeptostreptococcusEubacteriumPeptococcusBacteroidesClostridiumGram-Positive BacteriaPeptococcaceaeBacteroides fragilisGram-Negative BacteriaBacteroidaceaeBacterial InfectionsBacteriological TechniquesRNA, Ribosomal, 16SVeillonellaCulture MediaAnti-Bacterial AgentsPrevotella melaninogenicaPropionibacteriumMicrobial Sensitivity TestsDNA, BacterialCefotetanDNA, RibosomalMolecular Sequence DataPhylogenyFermentationClostridium perfringensBacterial ProteinsCefoxitinPrevotellaMetronidazoleCephamycins