comamonas nitrativorans comamonas nitrativorans comamonas nitrativorans is a gram-negative, oxidase- and catalase-positive bacterium from the genus comamonas, which was isolated from a denitrifying reactor treating landfill leachate. c. nitrativorans has the ability to perform anoxic-reduction of nitrate, nitrite, and nitrous oxide to nitrogen. comamonas nitrativorans scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: comamonadaceae genus: comamonas species: c. nitrativorans binomial name comamonas nitrativoransetchebehere et al. 2001 type strain 23310, cct 7062, ccug 45781, cip 107121, dsm 13191, lmg 20949, nccb 100007, strain 23310