Morita M, Yamamoto T, Watanabe T
Department of Preventive Dentistry, Okayama University Dental School, Japan.
J Dent Res. 1991 Jul;70(7):1048-51. doi: 10.1177/00220345910700070601.
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.
本研究测定了从有牙结石者和无牙结石者分离出的二氧化碳嗜纤维菌属菌种在水解N-苯甲酰-L-精氨酸对硝基苯胺方面的分布、遗传相关性和肽酶活性。牙结石组菌斑样本中二氧化碳嗜纤维菌属菌种的比例和流行率高于无牙结石组，且这些细菌表现出较高的肽酶活性。牙龈二氧化碳嗜纤维菌在牙结石组中比在无牙结石组中更常见，并且其肽酶活性比赭黄二氧化碳嗜纤维菌和生痰二氧化碳嗜纤维菌高得多。从牙结石组中分离出的黑色色素菌落也比无牙结石组更常见。由于这些微生物的肽酶活性很低或没有，因此未对其进行进一步研究。
