Pires H H, Barbosa S E, Diotaiuti L
Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas, Centro de Pesquisas René Rachou-Fiocruz, 30190-002 Belo Horizonte, MG, Brasil.
Mem Inst Oswaldo Cruz. 2000 Nov-Dec;95(6):883-8. doi: 10.1590/s0074-02762000000600025.
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.
锥蝽（南美锥蝽）可能起源于玻利维亚，并被动扩散至南美洲的广大地区，在那里它是克氏锥虫的主要传播媒介。在其可能的起源地，该物种在两种不同的生态环境中定殖，因此在野生环境和人工栖息地中都可能出现。在其分布的其他地区未观察到野生定殖模式，在这些地区，南美锥蝽仅存在于人造栖息地。本研究的目的是比较来自巴西米纳斯吉拉斯州和玻利维亚科恰班巴山谷的两个南美锥蝽种群的几个方面，以阐明与该物种观察到的不同定殖模式相关的因素。发育周期、体重、吸血能力和一龄若虫死亡率之间的差异应表明巴西种群更脆弱，这可能与其被消灭的可能性有关。
