Comparative developmental and susceptibility to insecticide of Bolivian and Brazilian populations of Triatoma infestans

Memórias do Instituto Oswaldo Cruz

Herton Helder Rocha Pires¹  Silvia Ermelinda Barbosa¹  Liléia Diotaiuti¹ 

[1] ,Centro de Pesquisas René Rachou-Fiocruz Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas Belo Horizonte MG ,Brasil

关键词: Triatoma infestans;    populations;    developmental cycle;    insecticides;   

DOI  :  10.1590/S0074-02762000000600025

来源: SciELO

【 摘 要 】

The triatomine bug Triatoma infestans probably originated in Bolivia and dispersed passively over wide areas of South America, where it is the principal vector of Trypanosoma cruzi. In the region of its probable origin this species shows colonization in two different ecotopes, so that it may be encountered in sylvatic as well as in artificial habitats. The sylvatic colonization pattern is not observed in the rest of its range, where T. infestans is exclusive to man-made habitats. The objective of this study was to compare several aspects of two T. infestans populations, one from Minas Gerais (Brazil) and the other from the Cochabamba Valley (Bolivia), with a view to elucidate the factors associated with the different colonization patterns observed for this species. The differences between the developmental cycle, weight, capacity to ingest blood and mortality rate of first instar nymphs should indicate more fragility of Brazilian population that may be related to its elimination possibility.

【 授权许可】

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