FIG. 5.

Plasma TNF-α and IFN-γ levels during the primary P. chabaudi chabaudi (AS) infection in male and female p55R^−/− (● and ■, respectively) and WT (○ and □, respectively) mice. Four mice per group were bled before and during the infection. The concentration of cytokines were measured by ELISA as described in Materials and Methods. Each symbol represents the amount of cytokine in an individual plasma sample.