Gram-positive, catalase-negative, chain-forming, coccus-shaped organisms were isolated both from intraperitoneally grown vesicles of the fox tapeworm and the oropharynges of laboratory-kept Mongolian jirds (). The strains displayed no haemolytic activity on Columbia sheep blood agar, pyrrolidonyl arylamidase activity was negative and the organisms reacted weakly with Lancefield group D antiserum. On the basis of phenotypic characteristics, the strains were tentatively identified as members of the genus . Comparative 16S rRNA gene sequencing studies confirmed their assignment to the genus and revealed that DSM 20770 was their closest phylogenetic neighbour (96.5 % sequence similarity). The levels of 16S rRNA gene sequence similarity between the isolates and representatives of species of the genus were only 95.7–96.2 %. On the basis of the phenotypic and molecular data presented, the isolates from Mongolian jirds represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is WUE3771 (=DSM 19192=CCUG 54871).


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vol. , part 4, pp. 766 – 770

Phylogenetic tree based on 16S rRNA gene sequences, showing the relationships among strain WUE3771 and related species of the genus

Score-oriented dendrogram of species related to the type strain of , WUE3771 , and three additional isolates

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