Parabacteroides chongii sp. nov., isolated from blood of a patient with peritonitis

An obligate anaerobic, Gram-reaction-negative, non-sporeforming, non-motile, rod shaped bacterium designated YMC B3181 T was isolated from the blood of a patient with peritonitis. Strain B3181 T grew at 20 to 40°C with optimum growth at 37°C. 16S rRNA gene sequence similarity showed strain B3181 T belongs to the genus Parabacteroides and is closely related to Parabacteroides faecis 157 T (97.3%), Parabacteroides gordonii MS-1 T (96.6%), and Parabacteroides goldsteinii DSM 19448 T (95.7%). The G + C content of the genomic DNA was 42.3 mol%. The major cellular fatty acids were anteiso-C 15:0 and iso-C 17:0 3-OH, and the predominant respiratory quinones were MK-9 and MK-10 menaquinones. Genomic and chemotaxonomic data supported affiliation of B3181 T with the genus Parabacteroides . Strain B3181 T was phylogenetically and phenotypically different from recognized species of the genus Parabacteroides . Accordingly, this isolate belongs to a novel species for which the name Parabacteroides chongii sp. nov. (type strain YMC B3181 T = LMG 30065 T = KACC 19034 T ) is proposed.