摘要： Schistosomiasis had been basically eradicated in Shanghai County for more than 5 years.In orderto detect latent or undiagnosed schistosomiasis patients in this area,serologic methods including COPand indirect immunoperoxidase staining technique(IPST)with cryo-section of adult worm as antigenwere employed to detect the antibodies in sera of 1947 case who were treated 5 to 10 years before