Statistical analysis of seropositivity data.

<p><b>A</b>. Age-adjusted seroprevalence for any <i>P. vivax</i> (blue solid lines) or <i>P. falciparum</i> antigens (red solid lines) using appropriate reversible catalytic models. The observed seroprevalences for each <i>Plasmodium</i> species (blue- and red-filled circles) were pooled according to the 10%-centiles of the underlying age distribution. Note that Sucuriju data for <i>P. falciparum</i> were excluded from the analysis due to the small number of sero-positive individuals (two cases only). <b>B.</b> Correlation analysis for any <i>P. vivax</i> antigens using the annual parasite index versus seroconversion rate.