achromobacter cholinophagum achromobacter cholinophagum achromobacter cholinophagum is a gram-negative bacterium of the genus achromobacter. achromobacter cholinophagum scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: alcaligenaceae genus: achromobacter species: a. cholinophagum binomial name achromobacter cholinophagum type strain atcc 15918, iam 12568, lmg 3504, nbrc 102400, ncimb 1501, ncmb 1501