Attraction of Chagas disease vectors (Triatominae) to artificial light sources in the canopy of primary Amazon rainforest

Memórias do Instituto Oswaldo Cruz

Marcelo Cm Castro²  Toby V Barrett²  Walter S Santos¹  Fernando Abad-franch¹  José A Rafael² 

[1] ,Instituto Nacional de Pesquisas da AmazôniaManaus AM ,Brasil

关键词: Triatominae;    light-trapping;    Amazon rainforest;    Chagas disease;   

DOI  :  10.1590/S0074-02762010000800019

来源: SciELO

【 摘 要 】

Adult triatomines occasionally fly into artificially lit premises in Amazonia. This can result in Trypanosoma cruzi transmission to humans either by direct contact or via foodstuff contamination, but the frequency of such behaviour has not been quantified. To address this issue, a light-trap was set 45 m above ground in primary rainforest near Manaus, state of Amazonas, Brazil and operated monthly for three consecutive nights over the course of one year (432 trap-hours). The most commonly caught reduviids were triatomines, including 38 Panstrongylus geniculatus, nine Panstrongylus lignarius, three Panstrongylus rufotuberculatus, five Rhodnius robustus, two Rhodnius pictipes, one Rhodnius amazonicus and 17 Eratyrus mucronatus. Males were collected more frequently than females. The only month without any catches was May. Attraction of most of the known local T. cruzi vectors to artificial light sources is common and year-round in the Amazon rainforest, implying that they may often invade premises built near forest edges and thus become involved in disease transmission. Consequently, effective Chagas disease prevention in Amazonia will require integrating entomological surveillance with the currently used epidemiological surveillance.

【 授权许可】

CC BY   
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