necropsobacter rosorum necropsobacter rosorum necropsobacter rosorum is a gram-negative bacterium from the genus of necropsobacter. necropsobacter rosorum can cause bacteremia in rare cases.. necropsobacter rosorum scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pasteurellales family: pasteurellaceae genus: necropsobacter species: n. rosorum binomial name necropsobacter rosorumchristensen et al. 2011 type strain ccm 7802, ccug 28028, cip 110147, ccug 28028 synonyms pasteurella cf. haemolytica