flavobacterium defluvii flavobacterium defluvii flavobacterium defluvii is a gram-negative and non-spore-forming bacterium from the genus of flavobacterium which has been isolated from activated sludge from a municipal wastewater treatment plant in pohang in korea. flavobacterium defluvii scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: flavobacterium species: f. defluvii binomial name flavobacterium defluviipark et al. 2007 type strain cip 109898, dsm 17963, emb117, kctc 12612