Fig. 2From: Immune response and protective effect against chronic Toxoplasma gondii infection induced by vaccination with a DNA vaccine encoding profilinDetermination of IgG antibodies in the sera of Kunming mice at 0, 2, 4, and 6 weeks. Mice immunized with pVAX-IL-15, pVAX I, PBS and nothing were treated as controls in statistical analysis. Each bar represents the mean OD (±S.E., n = 3). ***P < 0.0001, ** P < 0.01, * P < 0.05, NS: not significantBack to article page