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Journal of Dental Research
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Identification by Biotinylated DNA Probes of Capnocytophaga Species Isolated from Supragingival Calculus

M. Morita

Department of Preventive Dentistry, Okayama University Dental School, Shikata-cho, Okayama 700, Japan

T. Yamamoto

Department of Preventive Dentistry, Okayama University Dental School, Shikata-cho, Okayama 700, Japan

T. Watanabe

Department of Preventive Dentistry, Okayama University Dental School, Shikata-cho, Okayama 700, Japan

The distribution, genetic relatedness, and peptidase activity in hydrolyzing N-benzoyl-L-arginine- p-nitroanilide by Capnocytophaga species isolated from calculus- and non-calculus-formers were determined in this study. The proportion and prevalence of Capnocytophaga species were higher in plaque samples from the calculus group than in those from the non-calculus group, and these bacteria showed high peptidase activity. C. gingivalis were found more frequently in the calculus group than in the non-calculus group, and possessed much higher peptidase activity than C. ochracea and C. sputigena. Black-pigmented colonies were also recovered more frequently from the calculus group than from the non-calculus group. Since these organisms had little or no peptidase activity, they were not studied further.

Journal of Dental Research, Vol. 70, No. 7, 1048-1051 (1991)
DOI: 10.1177/00220345910700070601
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