bartonella rattimassiliensis bartonella rattimassiliensis bartonella rattimassiliensis is a bacterium from the genus bartonella which was isolated from the rat rattus norvegicus. bartonella rattimassiliensis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: bartonellaceae genus: bartonella species: b. rattimassiliensis binomial name bartonella rattimassiliensisgundi et al. 2004