yersinia mollaretii yersinia mollaretii yersinia mollaretii is a gram-negative species of bacteria. the species is named after henri mollaret, the former head of the national yersinia center at institut pasteur. yersinia mollaretii scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: enterobacterales family: yersiniaceae genus: yersinia species: y. mollaretii binomial name yersinia mollaretiiwauters et al. 1988