Table 1.

Summary of treatments performed on mice^a

Group	Treatment
I	PBS
II	pVAX I
III	pIRESneo
IV	pVAX/IL-18
V	pVAX/TgPLP1
VI	pVAX/MIC6
VII	pIRESneo/MIC6/TgPLP1
VIII	pIRESneo/MIC6/TgPLP1+pVAX/IL-18

^aEach group consisted of 25 mice. All treatments were injected into the thigh muscle and were given in 100 μl of PBS. For groups II through VIII, 100 μg of plasmid DNA was given. Two weeks after the final inoculation, five mice in each group were challenged intragastrically with 80 cysts of T. gondii strain PRU, and eight mice in each group were orally infected with 20 cysts of strain PRU.