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vol.95 número6The postembryonic development of the ocellar system of Triatoma infestans Klug (Heteroptera: Reduviidae)Temporal change of the aggregation response in Triatoma infestans índice de autoresíndice de assuntospesquisa de artigos
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Memórias do Instituto Oswaldo Cruz

versão impressa ISSN 0074-0276versão On-line ISSN 1678-8060


PIRES, Herton Helder Rocha; BARBOSA, Silvia Ermelinda  e  DIOTAIUTI, Liléia. Comparative developmental and susceptibility to insecticide of Bolivian and Brazilian populations of Triatoma infestans. Mem. Inst. Oswaldo Cruz [online]. 2000, vol.95, n.6, pp.883-888. ISSN 0074-0276.

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.

Palavras-chave : Triatoma infestans; populations; developmental cycle; insecticides.

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