Reyes-Novelo E, Ruiz-Piña H, Escobedo-Ortegón J, Barrera-Pérez M, Manrique-Saide P, Rodríguez-Vivas R I
Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Univ Autónoma de Yucatán, Mérida, Yucatán, México.
Neotrop Entomol. 2013 Jun;42(3):317-24. doi: 10.1007/s13744-013-0120-x. Epub 2013 Mar 21.
The present is a longitudinal study that describes the abundance of Triatoma dimidiata (Latreille) (Hemiptera: Reduviidae) and its infection with Trypanosoma cruzi in a rural community of Yucatan, Mexico. From a total of 370 individuals collected, 81.3% were adults, most from intradomicile ecotope (282/301), but nymphs were more abundant in peridomicile (58/69). The overall proportion of infected bugs was 21.9% (23.9% of adults and 13% of nymphs). The infection proportion was similar between intradomicile and peridomicile ecotopes (22.8% and 18.1%, respectively). Overall, 76.5% (36/47) of the houses and their backyards were infested. Of those, 27.7% were colonized and 75% had infected triatomines. Our data showed different proportions on infestation, colonization and bug density. Ninety-seven percent of overall peridomicile abundance was distributed in chicken coops, doghouses, opossum nests and dove cages. Triatomine entomological indices showed higher infestation and density inside domiciles, but higher colonization in the peridomicile. The abundance, the amount of infected intradomicile adult T. dimidiata and the incidence of infestation showed a seasonal pattern, with 63.7% of all individuals collected during the late dry season (April to June). We showed the peridomicile colonization of animal shelters and suggest it as a relevant source of T. dimidiata individuals. As infected bugs were found in both ecotopes, the studied area is under a high risk of T. cruzi transmission to humans.
本研究为一项纵向研究，描述了墨西哥尤卡坦半岛一个农村社区中半翅目锥蝽科的二色锥蝽（Latreille）的数量及其感染克氏锥虫的情况。在总共收集的370只个体中，81.3%为成虫，大多数来自室内生态位（282/301），但若虫在室外生态位更为常见（58/69）。感染虫体的总体比例为21.9%（成虫为23.9%，若虫为13%）。室内和室外生态位的感染比例相似（分别为22.8%和18.1%）。总体而言，76.5%（36/47）的房屋及其后院受到侵扰。其中，27.7%的房屋有锥蝽聚居，75%有感染锥蝽。我们的数据显示，在侵扰、聚居和虫体密度方面存在不同比例。室外生态位总体数量的97%分布在鸡舍、狗窝、负鼠巢和鸽笼中。锥蝽昆虫学指标显示，室内侵扰和密度较高，但室外聚居程度较高。二色锥蝽的数量、室内感染成虫的数量以及侵扰发生率呈现季节性模式，所有收集个体的63.7%是在旱季后期（4月至6月）采集的。我们展示了动物庇护所的室外聚居情况，并认为这是二色锥蝽个体的一个相关来源。由于在两个生态位均发现了感染虫体，研究区域存在克氏锥虫传播给人类的高风险。
