Flavobacterium lutivivi sp. nov., isolated from activated sludge.

A Gram-stain-negative, strictly aerobic, yellow, rod-shaped bacterium, designated strain HQQ(T), was isolated from a municipal wastewater treatment plant in Hebei Province, PR China. Comparative 16S rRNA gene sequence analyses showed that strain HQQ(T) is a member of the genus Flavobacterium and is closely related to 'Flavobacterium shanxiense' CCTCC AB 2014079(T) (94.8 %) and Flavobacterium macrobrachii DSM 22219(T) (94.7 %). Phylogenetic analysis showed that strain HQQ(T) clustered with Flavobacterium fontis JCM 18212(T) and Flavobacterium squillarum KCTC 23915(T). The polar lipid profile of strain HQQ(T) revealed the presence of phosphatidylethanolamine, six unknown aminolipids, one unknown glycolipid and one unknown lipid and the only isoprenoid quinone was MK-6. The dominant fatty acids of strain HQQ(T) were iso-C15 : 0, C15 : 0 and C16 : 1ω7c. The DNA G+C content of strain HQQ(T) is 32 mol%. On the basis of the phylogenetic and phenotypic data, strain HQQ(T) represents a novel species of the genus Flavobacterium, for which the name Flavobacterium lutivivi sp. nov. is proposed. The type strain is HQQ(T) ( = CGMCC 1.15347(T) = KCTC 42935(T)).