Objectives: To determine best dilutions and concentrations of ELISA test to detect IgE antibody, its sensitivity and specificityand predictive value in patients with cistyc echinococcosis. To analyze the relationship between IgE specific antibody level andalbendazole medical treatment response in a period over one year after completion of albendazole therapy. Design: Quasiexperimentalstudy with control group. Setting: Instituto de Medicina Tropical Daniel A. Carrion, Faculty of Medicine, UNMSM,Lima, Peru. Study material: IgE antibody ELISA test. Interventions: IgE antibody ELISA test standardization with preexperimentalpretest and post test in one group to assess its value in diagnosis and post-treatment of patients with hepatic hydatid cysts treatedwith albendazole. For ELISA test standardization we used serum from five patients with clinical and immunological diagnosis ofcystic echinoc...