Figure 2.

Temporal stability of quantitative measurements of antibodies. A: MSP-1₄₂ IgG levels (Mean ± SEM) measured by ELISA (solid circles, FVO; solid triangles, 3D7) at the 6 time points. Each time point is separated by approximately 3 weeks with the exception of October 6 to April 6 time points which are separated by 6 months (denoted by two short parallel lines through the x-axis). No significant change in IgG levels was observed over time. B: GIA (open squares) and MSP-1₁₉ IIA (open triangles) (Mean ± SEM) at the 6 time points. Between October 6 and April 6 time points, a statistically significant increase in MSP-1₁₉ IIA (p = .02, paired t test) was observed. No significant change in GIA levels was observed over of any of the other time points.