Infection experiments revealed that all wild-type C57BL/6 mice survived until day 30 of infection, while all mice deficient in the IFN-γ receptor (Ifngr1-/- mice) succumbed (Fig. 2a), indicating that TgCatJp5 is a low virulent strain and is eliminated by an IFN-γ-dependent immune response. This evidence concerns the gene IFNGR1 and infection.