anaplasma platys anaplasma platys anaplasma platys (formerly ehrlichia platys) is a gram-negative bacterium. anaplasma platys scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rickettsiales family: ehrlichiaceae genus: anaplasma species: a. platys binomial name anaplasma platysdumler et al., 2001