FIG. 1.

Percent survival of male (a) and female (b) WT (closed circles) and IL-5−/− (open circles) mice infected with T. gondii. Mice were infected with 10 T. gondii cysts by the oral route (n = 5 to 7 per group). IL-5−/− mice infected by the oral route had significantly greater survival than WT mice infected by the same route irrespective of gender, although females had greater mortality rates than males. No deaths occurred in either male or female WT or IL-5−/− mice infected by the intraperitoneal route (data not shown). Results represent five replicate experiments. Numbers along the x axes indicate the number of days postinfection.