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Int J Syst Evol Microbiol 58 (2008), 2755-2761; DOI  10.1099/ijs.0.2008/001032-0
© 2008 International Union of Microbiological Societies

Veillonella magna sp. nov., isolated from the jejunal mucosa of a healthy pig, and emended description of Veillonella ratti

Mareike Kraatz and David Taras{dagger}

Institute of Animal Nutrition, Faculty of Veterinary Medicine, Free University Berlin, Brümmerstraße 34, D-14195 Berlin, Germany

Correspondence
Mareike Kraatz
mkraatz{at}zedat.fu-berlin.de

A bacterium, designated strain lac18T, was isolated in pure culture from the mucosal jejunum of a healthy pig, using a medium selective for anaerobic lactic acid bacteria and containing porcine gastric mucin as the main carbon and nitrogen source. Cells of this strain were coccus-shaped, arranged singly or in pairs and were Gram-stain-negative, oxidase-negative, non-spore-forming, anaerobic and microaerotolerant. An analysis based on 16S rRNA gene sequences indicated that strain lac18T should be assigned to the genus Veillonella, class Clostridia, phylum Firmicutes. 16S rRNA and dnaK gene sequence-based phylogenetic analyses both indicated that the most closely related species were Veillonella ratti ATCC 17746T (similarities of 96.6 and 84.5 %, respectively) and Veillonella criceti ATCC 17747T (similarities of 96.6 and 83.4 %, respectively). The results of DNA–DNA hybridizations between strain lac18T and these Veillonella species and the type species of the genus, Veillonella parvula DSM 2008T, confirmed the genotypic distinctness of the novel isolate. Data from phenotypic studies also served to differentiate strain lac18T from related strains. Therefore strain lac18T represents a novel species of the genus Veillonella, for which the name Veillonella magna sp. nov. is proposed. The type strain is lac18T (=CCUG 55454T=CIP 109767T=DSM 19857T=JCM 15053T).

{dagger}Present address: Lohmann Animal Health GmbH & Co. KG, Heinz-Lohmann-Straße 4, D-27472, Cuxhaven, Germany.

The GenBank/EMBL/DDBJ accession numbers for the dnaK and 16S rRNA gene sequences of strain lac18T are EU096494 and EU096495, respectively.

Intra- and interspecific similarity percentages for the dnaK sequences of strain lac18T and strains in the genus Veillonella are presented in a supplementary table available with the online version of this paper.






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