Richer Wilfrid, Kengne Pierre, Cortez Mirko Rojas, Perrineau Marie Mathilde, Cohuet Anna, Fontenille Didier, Noireau François
Unité de Recherche 016, Institut de Recherche pour le Développement (IRD), Montpellier, France.
Trop Med Int Health. 2007 Jun;12(6):759-64. doi: 10.1111/j.1365-3156.2007.01846.x.
Triatoma infestans is the main vector of Chagas disease and target of control programmes in the Southern Cone countries. So far Bolivia is the only country where true T. infestans wild foci are documented. The dispersal ability for wild T. infestans was studied at microgeographical scale in Bolivian Andes, to assess the possibility for wild populations to actively recolonize insecticide-treated villages. Nine microsatellite loci were used to detect the extent of gene flow between neighbouring collecting sites. The detection of restricted gene flow between close but distinct sylvatic sites supports the hypothesis that wild T. infestans does not disperse by flying at high altitude (2,750 m asl). It gradually disperses over small distances by walking within a 'patch' of continuous land cover. The genetic differentiation detected between sylvatic and domestic populations suggests a limited short-term role of wild insects in the process of recolonization of insecticide-treated houses in the Andes.
克氏锥蝽是恰加斯病的主要传播媒介，也是南锥体国家控制项目的目标对象。到目前为止，玻利维亚是唯一有记录的存在真正克氏锥蝽野生疫源地的国家。在玻利维亚安第斯山脉的微观地理尺度上研究了野生克氏锥蝽的扩散能力，以评估野生种群主动重新定殖经过杀虫剂处理的村庄的可能性。使用9个微卫星位点来检测相邻采集地点之间的基因流动程度。在距离相近但不同的野生地点之间检测到有限的基因流动，这支持了野生克氏锥蝽不会在高海拔（海拔2750米）飞行扩散的假说。它通过在连续土地覆盖的“斑块”内行走，在小范围内逐渐扩散。在野生种群和家栖种群之间检测到的遗传分化表明，在安第斯山脉经过杀虫剂处理房屋的重新定殖过程中，野生昆虫的短期作用有限。
