Volume 87, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



In Chile, the main vector of Chagas disease, is under control after insecticide spraying. However, it has been found colonizing wild habitats. This study evaluated infection of sylvatic and domiciliary and identified their parasite genotypes. The sample studied was composed mainly of sylvatic nymphs and domiciliary adults from a semi-urban area with human dwellings under vector control surveillance. Results showed prevalences of 57.7% in nymphs and 68.6% in adults. Hybridization tests showed a major lineage (TcI) circulating in sylvatic (93.3%) and domiciliary (100%) . TcII, TcV, and TcVI were also detected, mainly in nymphs, suggesting differential adaptation of lineages among instars. We also discuss the origin of domiciliary individuals of and the risk of human infection by triatomines of sylvatic foci that invade houses despite vector control programs.


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  • Received : 15 Apr 2011
  • Accepted : 03 May 2012
  • Published online : 05 Sep 2012

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