Due to the low infectious dose of 10 cysts, inflammatory cytokines such as IFN- γ, IL-6, IL-12 and TNF were not detectable in any mice at 2 and 4 days after infection and, although detectable at day 9 post-infection, there was no significant difference in the levels of these cytokines in IL2C-treated versus untreated mice (data not shown). This evidence concerns the gene TNF and infection.