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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 105, No. 5, 2010, pp. 633-641
Bioline Code: oc10107
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 105, No. 5, 2010, pp. 633-641

 en Sylvatic foci of the Chagas disease vector Triatoma infestans check for this species in other resources in Chile: description of a new focus and challenges for control programs
Bacigalupo, Antonella; Torres-Pérez, Fernando; Segovia, Verónica; García, Alejandro; Correa, Juana P.; Moreno, Lucila; Arroyo, Patricio & Cattan, Pedro E.

Abstract

Triatoma infestans check for this species in other resources is one of the main domestic vectors of Chagas disease. Reports of wild habitat occurrences have recently increased. In Chile, after a successful elimination campaign of T. infestans domestic infestation, a sylvatic focus was reported in bromeliads in the metropolitan region. Here, we report a new focus of sylvatic T. infestans inhabiting rock piles in the Valparaíso region in central Chile. All T. infestans captured were nymphal instars living among the stones, which were inhabited by several mammal species, along with the sylvatic triatomine vector Mepraia spinolai check for this species in other resources . We found a prevalence of infection with Trypanosoma cruzi check for this species in other resources of 36.54% in T. infestans, similar to the previous report for sylvatic specimens from bromeliads. Sylvatic populations of T. infestans should be studied at different geographic scales to elucidate their role in the maintenance of the sylvatic transmission cycle of T. cruzi and their possible role in threatening the domestic elimination of this vector. This information should be used to re-design the control programs in Chile to avoid the re-establishment of the domestic cycle.

Keywords
Triatoma infestans - triatominae - Trypanosoma cruzi - Sylvatic Chagas disease vectors

 
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