Figure 3From: Oral vaccination with Trichinella spiralis DNase II DNA vaccine delivered by attenuated Salmonella induces a protective immunity in BALB/c miceSerum anti-TsDNase II IgG (A) and its subclass (B) responses in vaccinated mice were determined by ELISA with rTsDNase II. OD values are the mean ± SD of antibody levels of ten animals from each group. Vaccination time is marked with triangles, and an asterisk represents significant differences (P < 0.01).Back to article page