Figure 1. For domestic and peri-domestic habitats, we show the percentage of each type of blood meal found in that habitat and the T. cruzi prevalence in insect vectors that had fed on each blood source.

Vectors from domestic vs. peri-domestic habitats vary in their blood meal source. Almost all the insects that had fed on humans were collected from houses. Detection of cow, chicken pig or goat DNA in vectors collected from houses indicates a migrant from a peri-domestic to domestic habitat. Detection of human DNA in a vector collected from a peri-domestic habitat indicates migration from domestic to peri-domestic habitat.