Fig. 3.

Relationship among parasite load, blood meal engorgement, and the infectious dose transmitted to the mammalian host. (A) Pooled data showing the parasite load in sand flies that took different sizes of blood meals. Flies with greater parasite loads took smaller, partial meals: Jonckheere–Terpstra test, P = 0.0002. (B) Pooled data showing the infectious dose transmitted by sand flies that took different sizes of blood meals. Flies that took smaller blood meals tended to transmit a larger infectious dose: Jonckheere–Terpstra test, P = 0.019.