gemella sanguinis gemella sanguinis gemella sanguinis is a species of bacteria within the genus gemella. strains of this species were originally isolated from samples of human blood, and in one case from a patient with endocarditis. additional cases of endocarditis associated with g. sanguinis infections have been reported. gemella sanguinis scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: staphylococcaceae genus: gemella species: g. sanguinis binomial name gemella sanguiniscollins et al. 1998