<unk>  is a genus of anaerobic, Gram-negative, non-sporeforming bacteria, similar to Bacteroides. Individual cells are slender, rod-shaped bacilli with pointed ends. Strains of<unk>  cause several human diseases, including periodontal diseases, Lemierre's syndrome, and topical skin ulcers. Although older sources state that<unk>  is part of the normal flora of the human oropharynx, the current consensus is that<unk>  should always be treated as a pathogen. F. prausnitzii, a gut commensal associated with healthy patients, was completely reclassified as Faecalibacterium (Clostridiales:Ruminococcaceae) in 2002.
Fusobacterium
Chromobacterium
Actinobacillus
Clostridium
Lactobacillus
Caulobacter
Staphylococcus aureus
Bacillus cereus