bartonella kosoyi bartonella kosoyi bartonella kosoyi is a bacterium from the genus bartonella. bartonella kosoyi scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: bartonellaceae genus: bartonella species: b. kosoyi binomial name bartonella kosoyigutiérrez et al. 2020