Methods The inhibition activity on P.gingivalis,P.intermedia and F.nucleatum of S.sanguis suspension and supernatant were measured by Pucci test and Agarose gel diffusion method.

• 方法分别采用交叉双层培养基法和微量琼脂糖弥散法测定血链球菌全菌细胞和培养上清液对牙龈卟啉单胞菌、中间普雷沃菌、具核梭杆菌的拮抗作用。