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1 Tsurumi University, School of Dental Medicine, Tsurumi, Yokohama, Kanagawa 230-8501, Japan
2 Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center, Wako, Saitama 351-0198, Japan
3 US Army Dental and Trauma Research Detachment, Great Lakes, IL 60088, USA
Correspondence
Masaaki Okamoto
okamoto-m{at}tsurumi-u.ac.jp
Three novel micro-organisms, designated strains OMB115T, OMB118 and OMB120, were isolated from dental plaque from golden hamsters fed with a high-carbohydrate diet. The three strains were Gram-positive, facultatively anaerobic rods that lacked catalase activity. Analysis of their partial 16S rRNA gene sequences indicated that these isolates belonged to the genus Bifidobacterium. They grew under aerobic conditions and each had a DNA G+C content of 53 mol%. On the basis of phylogenetic analyses involving phenotypic characterization and partial 16S rRNA gene sequencing, strain OMB115T represents a novel species of the genus Bifidobacterium, for which the name Bifidobacterium tsurumiense sp. nov. is proposed. The type strain is OMB115T (=JCM 13495T =DSM 17777T).
The GenBank/EMBL/DDBJ accession number for the 16S rRNA and hsp60 gene sequences of strain OMB115T are AB241106 and AB241108, respectively.
A neighbour-joining phylogenetic tree based on partial hsp60 gene sequences is available as supplementary material with the online version of this paper.
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