Microbiology
- Nose/sinuses: Streptococcus spp (especially S. milleri), Haemophilus spp, Bacteroides spp, Fusobacterium spp
- Teeth: Streptococcus spp, Bacteroides spp, Prevotella spp, Fusobacterium spp, Haemophilus spp
- Ears: Enterobacteriaceae, Streptococcus spp, Pseudomonas aeruginosa, Bacteroides spp
- Lungs: Streptococcus spp, Fusobacterium spp, Actinomyces spp
- Urinary tract: Pseudomonas aeruginosa, Enterobacter spp
- Penetrating head trauma: Staphylococcus aureus, Enterobacter spp, Clostridium spp
- Neurosurgery: Staphylococcus spp, Streptococcus spp, Pseudomonas aeruginosa, Enterobacter spp
- Endocarditis: Viridans streptococci, S. aureus
- Congenital cardiac malformations (especially right-to-left shunts): Streptococcus spp
- Plus anaerobes, which are common
