  A map of potential prevalence of Chagas disease (ChD) with high spatial
disaggregation is presented. It aims to detect areas outside the Gran Chaco
ecoregion (hyperendemic for the ChD), characterized by high affinity with ChD
and high health vulnerability.
  To quantify potential prevalence, we developed several indicators: an
Affinity Index which quantifies the degree of linkage between endemic areas of
ChD and the rest of the country. We also studied favorable habitability
conditions for Triatoma infestans, looking for areas where the predominant
materials of floors, roofs and internal ceilings favor the presence of the
disease vector.
  We studied determinants of a more general nature that can be encompassed
under the concept of Health Vulnerability Index. These determinants are
associated with access to health providers and the socio-economic level of
different segments of the population.
  Finally we constructed a Chagas Potential Prevalence Index (ChPPI) which
combines the affinity index, the health vulnerability index, and the population
density. We show and discuss the maps obtained. These maps are intended to
assist public health specialists, decision makers of public health policies and
public officials in the development of cost-effective strategies to improve
access to diagnosis and treatment of ChD.
