Figure 4.

Plasmodium falciparum infection intensity does not differ across population groups. A. Oocyst infection intensity of the three population groups, A. gambiae s.s. M form, S form and A. arabiensis, was calculated individually for each of 29 experimental infections, and descriptive statistics are summarized in a box plot (top and bottom of the box, 75^th and 25^th percentile; solid line within the box, median; dashed line within the box, mean; error bars, 90^th and tenth percentiles; dots, outliers). B. As in A, but only for the subset of 13 most representative infections. Neither the 29-infection dataset in A nor the 13-infection subset in B display a significant difference for infection intensity among population groups (see Results).