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Int J Syst Evol Microbiol 55 (2005), 427-431; DOI  10.1099/ijs.0.63376-0
© 2005 International Union of Microbiological Societies

Actinomyces dentalis sp. nov., from a human dental abscess

Val Hall1, Matthew D. Collins2, Paul A. Lawson2, Enevold Falsen3 and Brian I. Duerden1

1 Anaerobe Reference Laboratory, NPHS Microbiology Cardiff, University Hospital of Wales, Cardiff CF14 4XW, UK
2 School of Food Biosciences, University of Reading, Reading, UK
3 Culture Collection, Department of Clinical Bacteriology, University of Göteborg, Göteborg, Sweden

Correspondence
Val Hall
hallv{at}cardiff.ac.uk

A previously undescribed filamentous, beaded, Gram-positive, rod-shaped bacterium was isolated from pus of a human dental abscess. Based on its cellular morphology and the results of biochemical testing the organism was tentatively identified as a member of the genus Actinomyces, but it did not correspond to any currently recognized species of this genus. Comparative 16S rRNA gene sequencing studies showed the bacterium represents a distinct subline within the genus Actinomyces, clustering within a group of species that includes Actinomyces bovis, the type species of the genus. Sequence divergence values of >8 % with other recognized species within this phylogenetic group clearly demonstrated that the organism represents a hitherto unknown species. Based on biochemical and molecular phylogenetic evidence, it is proposed that the unidentified organism recovered from a dental abscess be classified as a novel species, Actinomyces dentalis sp. nov. The type strain is R18165T (=CCUG 48064T=CIP 108337T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain CCUG 48064T is AJ697609.




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Actinomyces ruminicola sp. nov., isolated from cattle rumen.
Int J Syst Evol Microbiol, September 1, 2006; 56(Pt 9): 2043 - 2048.
[Abstract] [Full Text] [PDF]


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