The present study was conducted as atrial to treat secondary hydatidosis in white mice of species Mus musculus. (Balb/c strain), experimentally infected with secondary hydatid cysts of sheep origin. The immunization process was carried by using CF/PS antigen which consist hydatid cyst fluid (CF) antigen, and protoscolices (PS) antigen mixed together and by using two concentrations 7.5, 15 mg/ml. Then derivatives of Benzimidazole, Mebendazole (M) and drugs Albendazole (A) were used 10 and 40 μm/gm body weight respectively. The mixture of drugs was used one week after challenged dose. Criteria taken into consideration to define the activity of the immunization and chemotherapy in this study were reduction in the numeral of cysts, the coefficient of split cells in spleen and boon marrow, and measurement cellular and humoral immune response. The results of the present consider demonstrated those portray the viability about immunization also chemotherapy all the while over decay those numeral of growing cyst, toward that perspective stately both humoral and cell-mediated immunity. Those outcomes indicated raise those safe reactions that replicated diminish numeral Also breadth for hydatid growth. Those goal that viability of immunotherapeutic state over reversal those developing from growing hydatid cysts to mice.
