Absence of domestic triatomine colonies in an area of the coastal region of Ecuador where Chagas disease is endemic

Memórias do Instituto Oswaldo Cruz

Mario J Grijalva²  Francisco S Palomeque¹  Anita G Villacís¹  Carla L Black¹  Laura Arcos-terán¹ 

[1] ,Ohio University College of Osteopathic Medicine Biomedical Sciences Department OH ,USA

关键词: Chagas disease;    Ecuador;    Rhodnius ecuadoriensis;    Campylorhynchus fasciatus;    sylvatic;   

DOI  :  10.1590/S0074-02762010000500013

来源: SciELO

【 摘 要 】

Rhodnius ecuadoriensis 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 (Troglodytidae) nests. Finally, Trypanosoma cruzi 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.

【 授权许可】

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