bartonella koehlerae bartonella koehlerae bartonella koehlerae is a bacterium first isolated from cats. its genome consists of 1.7-1.8 mb. bartonella koehlerae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: bartonellaceae genus: bartonella species: b. koehlerae binomial name bartonella koehleraedroz et al. 2000