chryseobacterium defluvii chryseobacterium defluvii chryseobacterium defluvii is a bacterium. it is gram-negative, rod-shaped, non-spore-forming and yellow-pigmented, having been first isolated from wastewater, hence its name. its type strain is b2t (=dsm 14219t =cip 107207t). chryseobacterium defluvii scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: weeksellaceae genus: chryseobacterium species: c. defluvii binomial name chryseobacterium defluviikämpfer et al. 2003