brucella rhizosphaerae brucella rhizosphaerae brucella rhizosphaerae is a gram-negative, oxidase-positive bacteria from the genus of brucella which was isolated from rhizosphere from a potato in austria. brucella rhizosphaerae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: brucellaceae genus: brucella species: brucella rhizosphaerae binomial name b. rhizosphaerae(kämpfer et al. 2008) hördt et al. 2020 type strain ccm 7493, ccug 55411, dsm 19824, pr17 synonyms ochrobactrum rhizosphaerae kämpfer et al. 2008