LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Mexico.
Am J Trop Med Hyg. 2012 Apr;86(4):677-82. doi: 10.4269/ajtmh.2012.11-0746.
Chagas disease is endemic in the state of Veracruz, Mexico, and we investigated here the dynamics of house infestation by Chagas disease vectors to understand disease transmission and design effective control interventions. Bug collections in 42 rural villages confirmed the widespread distribution of Triatoma dimidiata in central Veracruz. Unexpectedly, collection data further indicated a clear pattern of seasonal infestation by mostly adult bugs. Analysis of feeding sources with a polymerase chain reaction-heteroduplex assay indicated a frequent feeding on humans, in agreement with the high seroprevalence previously observed. Feeding sources also confirmed a significant dispersal of bugs between habitats. High dispersal capabilities and seasonal infestation may thus be a shared characteristic of several of the T. dimidiata sibling species from this complex. It would thus be critical to adapt vector control interventions to this behavior to improve their efficacy and sustainability, as the control of T. dimidiata has been notoriously challenging.
恰加斯病在墨西哥韦拉克鲁斯州流行,我们在此研究了家栖型恰加斯病传播媒介的动态,以了解疾病传播并设计有效的控制干预措施。在 42 个农村村庄进行的臭虫收集证实了中韦拉克鲁斯州广泛分布有三带喙库蚊。出乎意料的是,收集数据进一步表明,主要是成年臭虫存在明显的季节性侵扰模式。聚合酶链反应-异源双链分析表明,臭虫经常以人类为食,这与先前观察到的高血清阳性率一致。食物来源还证实了臭虫在栖息地之间的大量扩散。因此,高扩散能力和季节性侵扰可能是来自该复杂物种的几种三带喙库蚊的共同特征。因此,必须根据这种行为调整病媒控制干预措施,以提高其效果和可持续性,因为三带喙库蚊的控制一直是一个极具挑战性的问题。