FOXP3 and helminthiasis: The expansion of FoxP3 + cells detected in the liver both by gene expression and by immunohistochemistry in the three infected groups as compared to the UC group agreed with the expansion of this cell type reported in F. hepatica infected sheep [8, 9, 20, 22] and goats [8] as well as in lymph nodes of F. hepatica infected cattle [25] and in other helminth infections [7].