<unk>  is a species of bacteria responsible for Lemierre's syndrome and other medical problems. It is an obligate anaerobe and is a common inhabitant of the alimentary tract within humans and animals.
Fusobacterium necrophorum
Staphylococcus saprophyticus
Pseudomonas aeruginosa
Bacillus anthracis
Corynebacterium haemolyticum
Bacillus subtilis
Corynebacterium diphtheriae
Pasteurella multocida