yersinia bercovieri yersinia bercovieri yersinia bercovieri is a gram-negative species of enteric bacteria. yersinia bercovieri scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: enterobacterales family: yersiniaceae genus: yersinia species: y. bercovieri binomial name yersinia bercovieriwauters et al. 1988 etymology yersinia bercovieri, n.l. gen. masc. n. bercovieri, of bercovier, named in honor of hervé bercovier, who first described biogroups 3a and 3b for yersinia enterocolitica. these biogroups are now known as yersinia mollaretii and yersinia bercovieri respectively.