Gram positive

• Streptococci group A/B/C/G/F

• Streptococcus pneumoniae

• Streptococcus anginosus group

• Enterococcus faecalis

• Listeria monocytogenes

Gram negative

• Neiserria meningitidis

• Pasturella multocida

Anaerobic

• Actinomyces

• Clostridia

• Peptostreptococci