ABSTRACT
The genus Fusobacterium covers a large number of grampositive, nonspore-forming, nonmotile, anaerobic, rodshaped bacterial species that come under the family Fusobacteriaceae, class Fusobacteria, phylum Fusobacteria. Currently, at least 25 species/subspecies are recognized within the genus: Fusobacterium alocis, Fusobacterium canifelinum, Fusobacterium equinum, Fusobacterium gonidiaformans, Fusobacterium mortiferum, Fusobacterium naviforme, Fusobacterium necrogenes, Fusobacterium necrophorum subsp. funduliforme, Fusobacterium necrophorum subsp. necrophorum, Fusobacterium nucleatum subsp. animalis, Fusobacterium nucleatum subsp. fusiforme, Fusobacterium nucleatum subsp. nucleatum, Fusobacterium nucleatum subsp. polymorphum, Fusobacterium nucleatum subsp. vincentii, Fusobacterium perfoetens, Fusobacterium periodonticum, Fusobacterium plautii, Fusobacterium polysaccharolyticum, Fusobacterium prausnitzii, Fusobacterium pseudonecrophorum, Fusobacterium russii, Fusobacterium simiae, Fusobacterium sulci, Fusobacterium ulcerans, and Fusobacterium varium.
