粘性放线菌(actinomyces viscosus简AVS)是人体和某些动物口腔中固有的丝革兰氏阳性兼性厌氧杆菌。它是构成体口腔中龈下菌斑的的主要成份。放菌与链球菌共占菌斑菌群的35～85％。管有一些研究认为放线菌仅与牙龈健康有 Actinomyces viscosus (AVS) is an Escherichia coli-positive bacterium belonging to the genus Enterobacteriaceae that is inherent in the mouth of humans and some animals. It is the main component that forms subgingival plaque in the oral cavity. Bacteria and Streptococcus share 35 ~ 85% of the plaque flora. Some studies have suggested that actinomycetes are only associated with gum health