The selective medium of S.mutans is that: panceas peptone 2g, glucose 0.1g, sucrose 5g,L-cysteine 0.05, agar 2g, solution of VPI 4ml, di-potassiumhydrogerpHospHate 0.4g, add water to 100ml, pH5.4;

• 选择性培养基为：胰蛋白胨2g、葡萄糖0.；1g、蔗糖5g、磷酸氢二钾0