本文观察了青春型双歧杆菌（Ｂｉｆ·ａ）对小鼠血清溶菌酶含量的影响。结果发现，青春型双歧杆菌经腹腔和尾静脉注入均可使血清溶菌酶含量增高，以尾静脉注入效果更明显，认为青春型双歧杆菌对小鼠血清溶菌酶含量的影响，可能是该菌苗注入动物体内后刺激单核巨噬细胞增殖或改变其功能状态有关。 In this paper, we observed the effect of Bif-a on serum lysozyme in mice. The results showed that the bifidobacterium adolescence through the peritoneal and tail vein injection of serum lysozyme can increase the content of the tail vein injection effect is more obvious that the bifidobacterium adolescent serum of mouse lysozyme content may be the After the vaccine is injected into the animal body to stimulate monocyte-macrophage proliferation or change its functional status.