Sequence analysis of the spliced-leader intergenic region (SL-IR) and random amplified polymorphic DNA (RAPD) of Trypanosoma rangeli strains isolated from Rhodnius ecuadoriensis, R. colombiensis, R. pallescens and R. prolixus suggests a degree of co-evolution between parasites and vectors. - Urrea DA; Guhl F; Herrera CP; Falla A; Carranza JC; Cuba-Cuba C; Triana-Chávez O; Grisard EC; Vallejo GA (Acta tropica, 2011)