mycoplasma haemomuris mycoplasma haemomuris mycoplasma haemomuris, formerly known as haemobartonella muris and bartonella muris, is a gram-negative bacillus. it is known to cause anemia in rats and mice. mycoplasma haemomuris scientific classification domain: bacteria phylum: mycoplasmatota class: mollicutes order: mycoplasmatales family: mycoplasmataceae genus: mycoplasma species: m. haemomuris binomial name mycoplasma haemomurisneimark et al. 2001