HACEK group

Fastidious bacteria that can cause infective endocarditis (3% of native valve infections)
Normal human oral flora

Species

Haemophilus spp.
- H. parainfluenzae
- H. aphrophilus
- H. paraphrophilus
Aggregatibacter actinomycetemcomitans andaphrophilus
Cardiobacterium hominis
Eikenella corrodens
Kingella spp.