Table 2. Microorganisms Associated with Dental Infections

Aerobic Gram Positive Cocci

  • Viridans Group Streptococci
    • Streptoccocus anginosus
    • Streptococcus mitis
    • Streptococcus mutans
    • Streptococcus salivarius
    • Streptococcus sanguinis

Aerobic Gram Positive Bacilli

  • Rothia dentocariosa

Aerobic Gram Negative Coccobacilli

  • Aggregatibacter spp
  • Capnocytophaga spp
  • Eikenella spp
  • Haemophilus spp

Anaerobic Gram Positive

  • Actinomyces spp
  • Anaerobic Gram positive cocci
  • Anaerobic Gram positive bacilli

Anaerobic Gram Negative Bacilli

  • Porphyromonas spp
  • Fusobacterium spp
  • Prevotella spp
  • Bacteroides spp


  • Treponema spp


Aerobic Gram negative bacilli and Staphylococcus aureus rarely cause dental infections. They may be the causative agents in patients with serious underlying disease.