许多研究已证明,变形链球菌是引起龋病的一种重要致龋菌。它分布很广,在世界各地几乎所有的人,只要口腔有牙齿及其它固形物,都可查到它的存在,它不仅能牢固的粘附到牙齿表面,而且常常脱落下来。因此在口腔软组织、唾液及道排肠泄物中,均能见到它的迹踪。它们也可能是变形链球菌广泛传播的条件。变链菌在口腔内的定植和致龋力。在很大程度上依赖于碳水化合物。因此,人们所处的社会条件及其生活、卫生和饮食习惯的不同,变链菌的分布,有明显的型别差异。在欧洲、澳大利亚和北美,都是以c和d型为优势流行血清型,在非洲和埃及一般是a型,在亚洲和日本有报导 Many studies have proved that Streptococcus mutans is a cariogenic cariogenic important cariogenic bacteria. It is widely distributed and is found in almost all parts of the world by its presence in the mouth, with teeth and other solids, which not only adheres firmly to the surface of the tooth but often sloughs off. Therefore, oral soft tissue, saliva and vaginal discharge, can see its track. They may also be conditions for the widespread transmission of Streptococcus mutans. Streptococcus mutans in the oral colonization and cariogenic. Rely on carbohydrates to a large extent. Therefore, the social conditions in which people live and their life, health and eating habits, Streptococcus mutans distribution, there is a clear type of difference. In Europe, Australia and North America are predominantly serotypes c and d, generally a in Africa and Egypt, and reports in Asia and Japan