At two, four, and six weeks after infection, Bax expressions were 0.58 ± 0.037, 0.56 ± 0.044, and 0.62 ± 0.05, significantly higher than those of the uninfected group (0.39 ± 0.11) (F = 6.77, p < 0.05). The gene discussed is BAX; the disease is infection.