Prevotella pleuritidis sp. nov., isolated from pleural fluid.

A strain isolated from pleural fluid of a patient with suppurative pleuritis (strain GTC 3021(T)) was characterized in terms of its phenotypic and biochemical features, cellular fatty acid profile and phylogenetic position based on 16S rRNA gene sequence analysis. 16S rRNA gene sequence analysis showed that the isolate was a member of the genus Prevotella. The isolate was related to Prevotella enoeca ATCC 51261(T) with about 92 % 16S rRNA gene sequence similarity. The strain was an obligately anaerobic, non-pigmenting, non-spore-forming, non-motile, Gram-negative rod. Although the phenotypic and biochemical characteristics of the strain were similar to those of P. enoeca JCM 12259(T), the cellular fatty acid composition of the isolate was significantly different from that of P. enoeca JCM 12259(T) (C(18 : 1) omega 9c and anteiso-C(15 : 0) fatty acid content). Based on these data, we propose a novel Prevotella species, Prevotella pleuritidis sp. nov., with the type strain GTC 3021(T) (=JCM 14110(T) =CCUG 54350(T)). The G+C content of the type strain is 45.4 mol%.