1985; Daffos et al. 1988; Remington et al. 2011). Tg infection control in humans critically depends on a cell-mediated immune response and on the cytokine IFNγ (Gazzinelli et al. 1993, 1994; Hunter et al. 1994; Wilson, Matthews and Yap 2008). This evidence concerns the gene IFNG and infection.