Fig. 9
Levels of IFN-γ, IL-2, IL-4 and IL-12 from suspension of spleen lymphocytes in immunized mice. Levels of IFN-γ (a), IL-2 (b), IL-4 (c) and IL-12 (d) from the suspension of spleen lymphocytes were determined by ELISA assays, and PBS was used as a control. Data showed mean ± SD. *p < 0.05, **p < 0.01, and ***p < 0.001 (determined by one-way ANOVA followed by a Tukey–Kramer post hoc test)