Gram positive bacteria

• Most Streptococcus spp.

• Enterococcus faecalis

• Staphylococcus aureus (MSSA)

Gram negative bacteria

• Many Enterobacteriaceae

• Haemophilus spp.

• Moraxella catarrhalis

• Pasteurella multocida

• Capnocytophaga canimorsus

Anaerobes

• Bacteroides fragilis

• Prevotella spp.

• Clostridium spp. (excluding Clostridium difficile)

• Peptostreptococcus spp.

• Fusobacterium spp.

• Actinomyces spp.