Fig. 8

Animal experiments on recombinant r-L. lactis-Tα1-IFN as an immune adjuvant for Newcastle disease-inactivated vaccine. (a) Schematic diagram of recombinant r-L. lactis-Tα1-IFN as an immune adjuvant of Newcastle disease-inactivated vaccine in immunized animals; (b) Recombinant r-L. lactis-Tα1-IFN as an immune adjuvant for inactivated Newcastle disease vaccine, antibody level results in each group after 2, 3, and 4 weeks of immunization in animals. Data are presented as mean ± standard deviation. Statistical significance was set at *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001