chryseobacterium lactis chryseobacterium lactis chryseobacterium lactis is a gram-negative bacteria from the genus of chryseobacterium. chryseobacterium lactis scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: weeksellaceae genus: chryseobacterium species: c. lactis binomial name chryseobacterium lactisholmes et al. 2013 type strain a140/68, ccug 60566, cdc kc1864, nctc 11390, f68