TLR2 and infection: Mun et al. [17] reported that TLR2-deficient mice failed to survive against T. gondii infection, and concluded that TLR2 is an essential molecule for protective immunity against T. gondii. In contrast, Debierre-Grockiego et al. [18] reported no effect of single TLR2-knockout on the survival of mice during infection, and went on to describe varying roles for TLRs during T. gondii infection depending on the genetic background of mice, infective inoculums, and parasite strain used.