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as well as progressive reductions of mortality and morbidity rates in controlled areas. In economic terms, the cost-benefit relationship between intervention (insecticide spraying, serology in blood banks) and the reduction of Chagas disease (in terms of medical and social care and improved productivity) is highly positive. Effective control of Chagas disease is now seen as an attainable goal that depends primarily on maintaining political will, so that the major constraints involve problems associated with the decentralisation of public health services and the progressive political disinterest in

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and Venezuela have the domestic, peridomicile and sylvatic cycles, with high prevalence of human infection and prevalence of chronic Chagas' cardiomyopathy (CCC).Group II -Colombia, Costa Rica and Mexico, characterized by domestic and peridomicile cycles with presence of CCC.Group III -El Salvador, Guatemala, Nicaragua and Panama have domestic, peridomicile and sylvatic cycles with poor clinical information. AbstractMuch has been achieved in one century after Carlos Chagas' discovery. However, there is surely much to be done in the next decades. At present, we are witnessing many remarkable efforts to monitor the epidemiology of the disease, to better understand the biology of the T. cruzi and its interaction with human beings as well as the pathogenesis and pathophysiology of the complications in the chronic phase, and deal more appropriately and effectively with late cardiac and digestive manifestations.

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Created in 1991 by the governments of Argentina, Bolivia, Brazil, Chile, Paraguay, and Uruguay, the Southern Cone Initiative (SCI)

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