While no detectable cytokine production was found at 120 dpi in the spleen of animals from both infection groups in the first experiment (data not shown), in the heterologous infection model significant IFN-γ transcript levels were detected 60 days after the second infection for the Ghigh/LRhigh (p < 0.05), Ghigh1/2t (p < 0.01), and LRhigh/Ghigh (p < 0.001) (Figures 7A,B). The gene discussed is IFNG; the disease is infection.