bergeyella cardium bergeyella cardium bergeyella cardium is a bacterium from the genus of bergeyella so named since it can sometimes be the cause of infective endocarditis. bergeyella cardium scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: weeksellaceae genus: bergeyella species: b. cardium binomial name bergeyella cardiumsohn et al. 2015 type strain jcm 30115, nccp 15908, 13-07