Microbiology
Small gram-negative rods. About half with have a pit in the middle of the agar colonies.
Epidemiologic Risks
Mouth flora.
Syndromes
It may be found where ever aspiration or spit is found.
It is a cause of HACEK endocarditis (it's the E).
It is part of infections after some poor drunken fool punches another drunken fool in the mouth and ends up with a hand infection (see Bites, human).
Needle lickers have had osteomyelitis (PubMed).
Treatment
Ampicillin, or a third-generation cephalosporin, or tetracycline
Notes
It is not treated by first-generation cephalosporins, such as you might give to the above mentioned drunken fool who presents to you ER with a hand infection and an allergy to penicillin. See Human Bite for further information.
Curious Cases
Relevant links to my Medscape blog
Last Update: 04/26/18.