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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. 677-681
Bioline Code: oc10114
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 105, No. 5, 2010, pp. 677-681

 en Absence of domestic triatomine colonies in an area of the coastal region of Ecuador where Chagas disease is endemic
Grijalva, Mario J.; Palomeque, Francisco S.; Villacís, Anita G.; Black, Carla L. & Arcos-Terán, Laura

Abstract

Rhodnius ecuadoriensis check for this species in other resources is considered the second most important vector of Chagas disease in Ecuador. It is distributed across six of the 24 provinces and occupies intradomiciliary, peridomiciliary and sylvatic habitats. This study was conducted in six communities within the coastal province of Guayas. Triatomine searches were conducted in domestic and peridomestic habitats and bird nests using manual searches, live-bait traps and sensor boxes. Synantrhopic mammals were captured in the domestic and peridomestic habitats. Household searches (n = 429) and randomly placed sensor boxes (n = 360) produced no live triatomine adults or nymphs. In contrast, eight nymphs were found in two out of six searched Campylorhynchus fasciatus check for this species in other resources (Troglodytidae) nests. Finally, Trypanosoma cruzi check for this species in other resources DNA was amplified from the blood of 10% of the 115 examined mammals. Environmental changes in land use (intensive rice farming), mosquito control interventions and lack of intradomestic adaptation are suggested among the possible reasons for the lack of domestic triatomine colonies.

Keywords
Chagas disease - Ecuador - Rhodnius ecuadoriensis - Campylorhynchus fasciatus - sylvatic

 
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