sphingobacterium lactis sphingobacterium lactis sphingobacterium lactis is a gram-negative and rod-shaped bacterium from the genus of sphingobacterium which has been isolated from raw milk in bavaria in germany. sphingobacterium lactis scientific classification domain: bacteria phylum: bacteroidota class: sphingobacteriia order: sphingobacteriales family: sphingobacteriaceae genus: sphingobacterium species: s. lactis binomial name sphingobacterium lactisschmidt et al. 2012 type strain dsm 22361, lmg 25272, wcc 4521 synonyms sphingobacterium lacticum