The cyst inhibition rate analysis showed the immune protection of rEg.P29 againstE. multilacularis infection in CD4+ T cell-deficient mice was 35.74% compared with the control; after adoptive transfer of CD4+ T cells from wild-type mice, the protection of rEg.P29 againstE. multilocularis infection in CD4+T cell-deficient mice was 41.52% compared with the control (Table 1). Here, CD4 is linked to cyst.