hydrogenophaga defluvii hydrogenophaga defluvii hydrogenophaga defluvii is a gram-negative, oxidase-positive, rod-shaped, motile bacterium from the comamonadaceae family, which was isolated from wastewater. colonies of h. defluvii are pale yellow in color. hydrogenophaga defluvii scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: comamonadaceae genus: hydrogenophaga species: h. defluvii binomial name hydrogenophaga defluviikämpfer et al. 2005, sp. nov. type strain bsb 9.5, ccug 53903, cip 108119, dsm 15341