| Common bacterial agents | Less common bacterial agents |
|---|---|
| Gram positive organisms | Gram positive organisms |
| Viridan streptococci | Abiotrophia |
| Staphylococcus aureus | Gemella |
| Coagulase negative staphylococci | Nocardia |
| Enterococci | Clostridia |
| Gram negative organisms | Gram negative organisms |
| Haemophilus | Bartonella |
| Actinobacillus | Legionella |
| Cardiobacterium | Coxiella burnetii |
| Eikenella | Pasteurella |
| Kingella | Brucella |