Fusobacterium is a genus of anaerobic, Gram-negative, non-sporeforming bacteria, similar to Bacteroides. Individual cells are slender' rod-shaped bacilli with pointed ends. F. nucleatum is the most common source of infection, while F. necrophorum is the most virulent species. Infections may occur after surgical or accidental trauma, edema, anoxia, tissue destruction, and dog bite wounds.
Fusobacterium may be resistant to penicillin and there is widespread resistance to erythromycin and other macrolides.
Susceptibility to disinfectants: Fusobacteria are susceptible to solutions of 1% sodium hypochlorite, 0.2% chlorhexidine, 70% ethanol, 2% glutaraldehyde, 3% hydrogen peroxide, formaldehyde, phenolics, iodophores, calcium hydroxide, formocresol, and triclosan.
How long it can live in the environment: Fusobacteria have been known to persist in soil for up to 18 weeks, and survive well in wet soil with high manure content. They can be inactivated by UV light with a wavelength 254nm.