FIG. 3.

(A) Blood-stage parasitemia in groups of C3H/HeJ mice controls and immunized with 25 μg of either EcMSP4/5, yMSP1₁₉, or a combination of both administered as one injection. The number of survivors out of the total number of mice is shown in brackets next to the title of each graph. (B) Prechallenge antibody responses of C3H/HeJ mice cross-checked on yMSP1₁₉ and EcMSP4/5. Mean values of measurements of the optical density at 405 nm obtained from a 1:50,000 dilution (in duplicates) of individual sera from all mice in each group were plotted. Error bars represent the standard error of the mean.