We monitored peripheral parasitemia after infection at G13 in wild-type females and in Tlr4−/− females carrying Tlr4−/− or Tlr4+/− fetuses and found that the Tlr4 genotype in the maternal compartment did not affect the course of parasitemia during pregnancy, irrespective of the fetal Tlr4 genotype (Fig. 2A). The gene discussed is TLR4; the disease is infection.