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Int J Syst Evol Microbiol 59 (2009), 766-770; DOI  10.1099/ijs.0.65823-0
© 2009 International Union of Microbiological Societies

Streptococcus merionis sp. nov., isolated from Mongolian jirds (Meriones unguiculatus)

Dennis Tappe1, Rüdiger Pukall2, Peter Schumann2, Sabine Gronow2, Markus Spiliotis1, Heike Claus1, Klaus Brehm1 and Ulrich Vogel1

1 Institute of Hygiene and Microbiology, University of Würzburg, Josef-Schneider-Straße 2, D-97080 Würzburg, Germany
2 DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstraße 7b, D-38124 Braunschweig, Germany

Correspondence
Ulrich Vogel
uvogel{at}hygiene.uni-wuerzburg.de

Gram-positive, catalase-negative, chain-forming, coccus-shaped organisms were isolated both from intraperitoneally grown vesicles of the fox tapeworm Echinococcus multilocularis and the oropharynges of laboratory-kept Mongolian jirds (Meriones unguiculatus). 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 Streptococcus. Comparative 16S rRNA gene sequencing studies confirmed their assignment to the genus Streptococcus and revealed that Streptococcus hyointestinalis DSM 20770T 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 Streptococcus 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 Streptococcus, for which the name Streptococcus merionis sp. nov. is proposed. The type strain is WUE3771T (=DSM 19192T=CCUG 54871T).

Abbreviations: MALDI-TOF MS, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain WUE3771T is AM396401.

Supplementary figures showing a maximum-likelihood phylogenetic tree (based on 16S rRNA gene sequences) and a score-oriented dendrogram (based on data from MALDI-TOF MS) for the novel strains and related species in the genus Streptococcus are available with the online version of this paper.






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Copyright © 2009 by the International Union of Microbiological Societies.