Transmission success as measured by (A) the geometric mean oocyst load per mosquito and (B) the percentage of mosquitoes that were positive for at least one oocyst, related to day of death for the 2 single clone and the mixed clone type infections. Three birds in each group (injected with single or mixed parasite clones as in Figs. 1 & 2) were gorged on mosquitoes on the first day of patent infection. Thai clone (squares); SL clone (open circles); mixed clones (crosses). Line represents least squared residual best fit for the relationship between oocyst load and day of death. (A) R2 = 0.68, P = 0.017; (B) R2 = 0.41, P = 0.032.