Gibbsiella dentisursi sp. nov., isolated from the bear oral cavity.

A Gram-negative, rod-shaped, non-spore forming and non-motile bacterium, designated strain NUM 1720(T) , was isolated from the oral cavity of bears. Based on 16S rRNA gene sequence similarity, strain NUM 1720(T) was shown to be related to Gibbsiella quercinecans (99.4%). The gyrB and rpoB gene sequences of strain NUM 1720T showed 98.0% and 98.2% similarity with those of G. quercinecans. The DNA-DNA hybridization value of strain NUM 1720(T) with G. quercinecans was 63.8%. The G + C content of the genomic DNA of the isolates was 55.0 mol%. Fatty acid analysis data supported the affiliation of strain NUM 1720(T) to the genus Gibbsiella. The major menaquinone and ubiquinone were MK-8 and Q-8, respectively. Strain NUM 1720(T) can be differed from G. quercinecans by the reactions to acetoin, inositol and D-arabinose. Strain NUM 1720(T) therefore represents a novel species, for which the name Gibbsiella dentisursi sp. nov. is proposed, with type strain NUM 1720(T) (= JCM 17201(T) = DSM 23818(T)).