A main effect of infection was also found on the expression of IDO1 [F(1,30) = 5.86, p = 0.022; Figure 7A], CYBB [F(1,30) = 15.67, p < 0.001; Figure 7B], and NOS2 [F(1,30) = 6.16, p = 0.019; Figure 7C], where T. gondii-infected mice had increased expression compared to vehicle mice. The gene discussed is IDO1; the disease is infection.