粘性放线菌(Actinomyces viscosus)是人牙菌斑中主要细菌之一,它的存在可能与牙周病和龋病特别是老年牙根龋的发生有关。作者采用菌斑标本外培养方法,并通过各种生化试验和血清学试验,从牙菌斑中分离出粘性放线菌,为进一步研究该菌致病作用提供地方菌株。 Actinomyces viscosus is one of the major bacteria in human plaque. Its existence may be related to periodontal disease and caries, especially the aged carious root caries. The author adopted the method of bacterial plaque extracapsulation, and through various biochemical tests and serological tests, isolated from the dental plaque viscous actinomycetes, in order to further study the pathogenic role of the strain to provide local strains.