<unk>  is a genus of Gram-negative rod-shaped bacteria. Currently, eleven species within the genus are known, two of those are<unk>  violaceum and<unk>  subtsugae; the latter was discovered by scientists at the Agricultural Research Service in Beltsville, Maryland.
Chromobacterium
Corynebacterium
Caulobacter
Legionella
Actinobacillus
Bacillus anthracis
Mycoplasma
Helicobacter