10 strains can resist to acid(pH3). And, in the experiment of resistant to bile,the ratio of growth of 10 strains is surpass 3.0%.

• 试验菌株坚强肠球菌CB4-2 和 CB8-3 等 10 株菌在耐酸(pH3)试验中能存活；耐胆盐(0.；3%25牛胆酸钠)试验中生长率大于 3