RU486 treatment did not reverse impairment of thymocyte development in A. cantonensis-infected mice. Mice were infected with A. cantonensis first and treated with RU486 daily since 10 dpi until sacrificed. Proportion of thymocyte subsets was detected. Each group contained 4–6 mice. Values were shown as mean ± SEM. A two-tailed t test was used for statistical analysis. *, results differed from the control group; **P