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J Vet Med Sci. 2013 Jul 31;75(7):999-1001. Epub 2013 Mar 12.

Correlation of age with distribution of periodontitis-related bacteria in Japanese dogs.

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  • 1Department of Pharmacology, School of Veterinary Medicine, Azabu University, Sagamihara, Kanagawa 252-5201, Japan.


We analyzed the distribution of 11 periodontitis-related bacterial species in dental plaque collected from 176 Japanese dogs divided into young (less than 2 years of age), middle-aged (2-7 years of age) and elderly (more than 8 years of age) groups using a polymerase chain reaction method. Clinical examination revealed that no dogs in the young group were affected by periodontitis, whereas the rates for gingivitis and periodontitis were high in the middle-aged and elderly groups. In addition, the total numbers of bacterial species in the middle-aged and elderly groups were significantly greater than in the young group. Our findings suggest that age is an important factor associated with the distribution of periodontitis-related bacteria and periodontal conditions in dogs.

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