Fig. 3From: Immune response and protective effect against chronic Toxoplasma gondii infection induced by vaccination with a DNA vaccine encoding profilinAnalysis of IgG isotypes, IgG1 and IgG2a, in the sera of Kunming mice 2 weeks after the last immunization. Mice immunized with pVAX I, PBS and nothing were treated as controls in statistical analysis. Each bar represents the mean OD (±S.E., n = 3). ***P < 0.0001Back to article page