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1Department of Microbiology, AFRC Institute of Food Research, Reading Laboratory, Earley Gate, Reading RG6 2EF, United Kingdom, Finland
2Department of Veterinary Pathology, University of Sydney, New South Wales 2006, Australia, Finland
3Anaerobe Reference Laboratory, National Public Health Institute, 00300 Helsinki, Finland
4College of Veterinary Medicine, 00530 Helsinki, Finland
* Corresponding author. Mailing address: Department of Veterinary Pathology, Sydney University, New South Wales 2006, Australia. Phone: 61-2-692-2454. Fax: 61-2-552-6526. Electronic mail address: suvp00{at}angis.su.oz.au.
ABSTRACT
The partial 16S rRNA gene sequences of representative strains of two groups of anaerobic, gram-negative, pigmented, asaccharolytic, rod-shaped bacteria isolated from subgingival plaque of dogs with naturally occurring periodontal disease were determined. A comparative analysis of the rRNA sequence data revealed that the two groups of organisms represent previously unknown lines of descent within the genus Porphyromonas. On the basis of our phylogenetic findings and the phenotypic distinctiveness of the organisms, two new species, Porphyromonas cangingivalis and Porphyromonas cansulci, are proposed.
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