Anaerobic gram negative rods, long, thin, pointy ends and often in pairs. F. necrophorum, F. nucleatum. Part of the human GI tract.
Head and neck infection, often associated with poor dentition and/or aspiration.
Can be part of any mixed infection. Lemmier's (aka post anginal sepsis) is septic thrombophlebitis of the internal jugular vein. It can also cause septic thrombophlebitis of abdominal veins (PubMed). Like all bugs, can be found in a variety of sites.