mesocricetibacter mesocricetibacter mesocricetibacter is a genus of bacteria from the family of pasteurellaceae with one known species (mesocricetibacter intestinalis). mesocricetibacter intestinalis has been isolated from the caecitis of the hamster (mesocricetus auratus). mesocricetibacter scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pasteurellales family: pasteurellaceae genus: mesocricetibacterchristensen et al. 2014 type species mesocricetibacter intestinalis species m. intestinalis