FIG. 4.
Genomic library vaccination induces long-term protective immunity against T. gondii infection. Survival curves of BALB/c mice injected with pcDNA3-GL (⧫), vector pcDNA3 plasmid (▪), or saline (X) and challenged intraperitoneally with 105 tachyzoite forms of T. gondii strain RH 15 (A) or 24 (B) weeks after the last immunization. Kaplan-Meier plotting was used (STATSYST; Microsoft). Each group was composed of 10 mice. Similar results were obtained in three (A) or two (B) independent experiments.