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放线菌为人类和动物口腔内常居菌丛中的主要成员之一。由于发现此菌可侵及牙根面和牙周支持组织,而在近20年内被广泛地研究。为全面地了解放线菌和由其感染的疾病,本文对从人类口腔内最常分离出的菌种如依氏放线菌(A.Israelii简称依氏菌)、粘性放线菌(A.Viscosus)简称粘放菌)、内氏放线菌(A.Naeslundii简称内氏菌)和溶牙放线菌(A.Odontolyti(?)s简称溶牙菌)以及虽属放线菌科但不同属的R.Dentocariosa的细菌学予以概括介绍。
Actinomycetes are one of the major members of the resident flora in the mouth of humans and animals. This bacterium has been extensively studied in nearly 20 years because it was found to invade the root and periodontal support tissues. To fully understand the role of actinomycetes and the diseases they infect, the most commonly isolated strains from the oral cavity of humans, such as A.Israelii, A.mysennigenes, Viscosus), Actinomyces (A.Naeslundii referred to as Neisseria gonorrhoeae) and Actinomycete (A.Odontolyti (?) S referred to as bacteria) and Actinomycetes but not the same The genus R. Dentocariosa's bacteriology is summarized.