Fig. 3
From: The construction of recombinant Lactobacillus casei vaccine of PEDV and its immune responses in mice
The IgG antibody levels of candidate vaccines in the serum of immunized mice. Serum was collected on days 0, 14, and 28 days before or after immunization and examined via commercial ELISA kits and measured at an absorbance of 450 nm. Bars represent the mean ± standard deviation of three independent experiments. * p < 0.05, ** p < 0.01, and **** p < 0.0001 represent increasing degrees of significant differences, respectively, and ns means no significant difference