P. falciparum infection of An. quadriannulatus and An. gambiae.

Mosquito midguts were examined for P. falciparum live oocysts 10 days post-infection. Two independent experiments were performed. Oocyst prevalence is the percentage of mosquitoes displaying at least one live oocyst, and oocyst density is the median number of oocysts in infected mosquitoes. The range of oocyst numbers is also presented. In both experiments, the oocyst prevalence and density were substantially less in An. quadriannulatus compared to An. gambiae. Infection of An. quadriannulatus was not observed in experiment 1. The oocyst prevalence was analyzed with the Chi-square Fishers exact test with Yates correction, and the oocyst density with the Kruskal-Wallis non-parametric ANOVA. n, number of mosquitoes; ns not significant.