It was concluded that E.suis could interfere the immune effects of swine fever vaccine seriously, and the interference degree was coherent with E.suis infection degree.

• 说明，猪附红细胞体严重干扰了猪瘟疫苗的免疫效果，且干扰程度随着猪附红细胞体感染程度的加深而更为明显。