AIM:To explore if there are some antibody responses to be correlated strongly with susceptibility to reinfection of S.japonicum.METHODS:A group of1 96 individuals aged3 - 2 5 years old in a schistosomiasis endemic area in Nanshan Island of Poyang Lake,who were treated and followed up for identification of reinfection over a1 0 - month period during which intense transmission continued in the study area.Serology for testing isotype- restrict- ed antibody responses quantitatively to SEA and WA was perfor...