This phenomenon presented here indicates that the hypothesis of Siegel (1981) about red cell immune system ( RCIS ) also is correct in Equus caballus.

• 发现了马红细胞可形成细胞C_3b受体花环及免疫复合物花环,说明马红细胞也具有C_3b受体(CR_1),并可借助CR_1进行免疫粘连(IA)在生理和病理条件下发挥重要的免疫机能,即红细胞免疫系统学说(RCIS)对其仍适用。