CAT and infection: The CAT activity increased by 84.22% (1.0 × 105 spores/mL) and 33.57% (1.0 × 104 spores/mL) at 24 h after infection and decreased by 47.78% (1.0 × 105 spores/mL) and 36.33% (1.0 × 104 spores/mL) at 72 h after infection.