naxibacter varians naxibacter varians naxibacter varians is a gram negative, nonmotile rod-shaped, non-spore-forming, and oxidase positive bacterium from the oxalobacteraceae family, which was isolated from clinical specimens and water samples. naxibacter varians scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: oxalobacteraceae genus: naxibacter species: n. varians binomial name naxibacter varianskämpfer et al. 2008, sp. nov. type strain ccm 7478, ccug 35299, dsm 21873, r-1482, r-3575, rstn 96/5182, vandamme r-3575 etymology its specific name comes from the latin varians because biochemical tests have shown variable results.