口腔环境因素对血型链球菌和变形链球菌生长的影响：I.粘蛋白的影响

采用连续培养方法，以粘蛋白作为化学限定培养基中的限定性因子，观察血型链球菌（以下简称血链菌）和变形链球菌（以下简称变链菌）Ｉｎｇｂｒｉｔｔ（ｃ）的生长状态。结果显示变链菌不能生长于以粘蛋白作为唯一营养源的培养基中，而血链菌可以生长；两菌混合培养时的生长量均有所提高，表明两菌有协同降解粘蛋白作用。

Environmental factors in oral cavity effect on growing of Streptococcus sanguis and Streptococcus mutans-effect of Mucin]

Our study use continues culture technique through adding mucin as the limiting element in chemically defined culture,medium in order to observe growing states of S.sanguis 34 and,S.mutants Ingbritt(c).The results as follows:S.sanguis 34 were able to grow as pure culture on mucin;S.mutans was unable to grow as a pure culture on mucin,but attained a significant population size in the presence of S.sanguis.These results indicate a synergetic degradation of mucin by S.sanguis and S.mutans in mixed chemism culture.