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Survival rates of immunized mice after challenging with RH tachyzoites of T. gondii. BALB/c mice were immunized with PBS(● ), pcDNA3.1 (▲), pSAG1(Δ), pSAG1/SAG3(□), pSAG1/SAG3-CTXA2/B (■) three times with two weeks interval. Four weeks after final inoculation, mice (10 per group) were administered by challenging intraperitoneally with 1 x 103 tachyzoites of T. gondii RH strain.
