Figure 2From: DNA prime and peptide boost immunization protocol encoding the Toxoplasma gondii GRA4 induces strong protective immunity in BALB/c mice Levels of specific IgG antibodies in BALB/c mice. Sera samples of mice were collected from the tail vein at the end of each interval, four times in total and analyzed by ELISA. Results are shown as mean ± SD and statistically significant differences (P < 0.05) are indicated by (*) as compared to control groups.Back to article page