“…Sylvatic transmission of T. cruzi has been modelled successfully using classical nonlinear dynamical systems [5,6,7,12,13,14,15,20] to study the roles played in infection dynamics by issues such as contact process saturation, the aforementioned multiple host infection routes, crossimmunity, vector dispersal and migration, and vector-host population dynamics. A deterministic model of interstrain competition predicts classical competitive exclusion based on the pathogen's reproductive numbers [15,20], from which a fitness measure can be derived, paralleling the notion of invasion fitness (e.g., [9]).…”