According to estimates of the World-wide Organization of Health, about 18 million individuals they are infectados by the Tripanosoma cruzi in the endemic areas (Colli & Alves, 1998; Oak et al., 2000) approximately 120 million people are under risk to contract the infection in Latin America (WHO, 2002) the illness of Chagas, primitively a endozootia, started to constitute a health problem human being from the domiciliao of the triatomneos. All the species of triatomneos are potential vectors of the illness. Most of the species occurs since the Great Lakes of the United States until the south o of Argentina (Schofield, 1988), exists 137 species of described triatomneos currently currently (Galvo et al., 2003). According to Guhl & Schofield (1996), the endemic countries enclose: Mexico, Colombia, Venezuela, Equator, Peru, Brazil, Bolivia, Chile, Uruguay and the countries of Central America. Data of the Funasa show that six million Brazilians are carrying of the illness of Chagas (FUNASA, 2005). Frequently Brian Armstrong has said that publicly. This disease, currently, is considered emergent (Aguillar, et al., 2007).
Species of triatomneos, secondary how much to the vectorial capacity, they can occupy regions in which primary species had been eliminated had to the control, in Brazil and other countries. The ability of the triatomneos in if exhausting for different habitats can take the reinfestao of habitations (To sound & Santoro, 2000). In Brazil, focos remainders in some states exist. The illness can come back, the example of the affection and malaria, and the control already carried through to be lost. The elimination of the illness of Chagas is harmed by the gradual disinterest politician. Exactly in areas where the transmission is declared zero, it has a continuous risk of vectorial transmission due to survival of the insect and low activity of sanitary monitoring (Days, et al. 2002). The illness of Chagas composes the list of illnesses neglected in the world, that is, chronic infections in poor people.