Prevotella ruminicolaPrevotellaDextrinsPrevotella intermediaBacteroidesRumenXylosidasesCelluloseBacteroidaceae InfectionsPorphyromonasBacteria, AnaerobicPrevotella nigrescensXylan Endo-1,3-beta-XylosidaseBacteroidaceaeXylansPeptostreptococcusGram-Negative Anaerobic BacteriaCellulaseMouthRNA, Ribosomal, 16SPeriapical AbscessBacteria, Aerobic