aquabacterium parvum aquabacterium parvum aquabacterium parvum is a gram-negative, oxidase-positive, catalase-negative bacterium of the genus aquabacterium in the family comamonadaceae which was isolated with aquabacterium commune and aquabacterium citratiphilum from biofilms of berlins drinking water. aquabacterium parvum scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: comamonadaceae genus: aquabacterium species: a. parvum binomial name aquabacterium parvumkalmbach et al. 1999, sp. nov. type strain atcc baa-208, b6, ccm 4958, ccug 48317, cip 106983, dsm 11968, ncimb 13781, strain b6