Chryseobacterium treverense sp. nov., isolated from a human clinical source

Abstract

A yellow-pigmented, Gram-reaction-negative bacterium isolated from a human clinical source was investigated using a polyphasic approach in order to clarify its taxonomic status. Comparative 16S rRNA gene sequence analysis showed that the new isolate constituted a distinct phyletic line within the genusChryseobacterium, displaying >2.8 % sequence divergence with recognized species of this genus. The generic assignment was confirmed by chemotaxonomic data which revealed a fatty acid profile consisting of straight-chain saturated, monounsaturated and branched-chain fatty acids of iso-/anteiso-types as well as 3-hydroxylated fatty acids; a menaquinone with six isoprene units (MK-6) as the predominant respiratory quinone andsym-homospermidine as the predominant polyamine. The novel isolate could be distinguished from other members of the genusChryseobacteriumby a set of distinct biochemical properties. On the basis of phenotypic and phylogenetic evidence, it is proposed that the new isolate represents a novel species of the genusChryseobacteriumfor which the nameChryseobacterium treverensesp. nov. is proposed. The type strain is IMMIB L-1519T(=DSM 22251T=CCUG 57657T).