The changes in prevalence and intensity of infection over parasite selection.

<p>The changes in the prevalence and mean oocyst load following selection in a line of <i>P. gallinaceum</i> vectored exclusively by <i>An. stephensi</i> compared with that in <i>Ae. aegypti</i> that was simultaneously fed on the same chicken. Note the different Y-axes for the different mosquito species. Prevalence values of <i>An. stephensi</i> were adjusted by the mean prevalence of <i>Ae. aegypti</i> (0.95). Values of oocyst load of <i>An. stephensi</i> were adjusted by the mean oocyst load of <i>Ae. aegypti</i> (19.5). Vertical bars represent SEM (calculated separately for each generation). To avoid clutter, bars representing mean-SEM of <i>Ae. aegypti</i> were excluded.