were observed by blood routine test； the number of nucleated cells in the bone marrow was observed by nucleated cell count method； the pathological changes of spleen were observed by HE staining under microscope； the contents of IFN-γ and IL-4 in serum were detected by ELISA. Results Compared with the control group， the spleen index WBC， number of bone marrow nucleated cells and serum contents of IL-4 and IFN-γ in model group was significantly lower (P<0.05) ......