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Veillonella denticariosi sp. nov., isolated from human carious dentine

¹ Institute of Dental Research, Westmead Centre for Oral Health and Westmead Millennium Institute, Westmead Hospital, Wentworthville, NSW 2145, Australia
² Centre National de Référence des Bactéries Anaérobies et du Botulisme, Institut Pasteur, 25 rue du Dr Roux, 75724 Paris Cedex 15, France
³ Centre Hospitalier Universitaire de Montpellier et EA 3755, Laboratoire de Bactériologie, Hôpital Arnaud de Villeneuve, 371 avenue du Doyen Gaston Giraud, 34295 Montpellier Cedex 5, France

Correspondence
Roy Byun
roy_byun{at}wmi.usyd.edu.au

Selective culture of human carious dentine for Veillonella strains resulted in the isolation of two strains of a Gram-negative, coccus-shaped bacterium that has not been described previously. Comparative 16S rRNA and dnaK gene sequence analysis indicated that the two strains were homogeneous and comprised a distinct lineage within the genus Veillonella, phylogenetically most closely related to Veillonella rodentium. This was supported by DNA–DNA hybridization, which showed clearly that the two strains were similar and distinct from other Veillonella species, and the production of major cellular fatty acids (C_{13 : 0} and C_{17 : 1}8), which is consistent with other members of the genus Veillonella. Based on these observations, strains RBV81 and RBV106^T represent a novel species, for which the name Veillonella denticariosi sp. nov. is proposed, with the type strain RBV106^T (=CIP 109448^T =CCUG 54362^T =DSM 19009^T).

A matrix of DNA–DNA hybridization results and 16S rRNA gene sequence similarities is available as supplementary material with the online version of this paper.

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