The role of light in Chagas disease infection risk in Colombia
The role of light in Chagas disease infection risk in Colombia
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DOI：
10.1186/s13071-015-1240-4
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发表时间：
2016-01-05
影响因子：
3.2
通讯作者：
Cordovez, Juan
中科院分区：
文献类型：
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作者：
Erazo, Diana;Cordovez, Juan
背景：南美锥虫病是拉丁美洲最重要的病媒传染病，而哥伦比亚的主要病媒是长吻红锥虫。在这一地区的控制策略显示出不良的结果，由于昆虫的能力，分散之间的森林和国内栖息地。由于昆虫向房屋的迁徙是维持病媒与人类之间接触率的原因，因此了解促进迁徙的风险因素对于设计控制策略可能很重要。在这方面，据报道，成年锥蝽有能力在夜间受人造光的吸引而长距离移动。因此，灯泡可能在房屋入侵中发挥关键作用。本研究的主要目的是了解人工光，或简单的光，在室内的作用，由R。prolixus.Methods:为了研究光的作用，我们结合实地考察，在村的Chavinave，卡萨纳雷，哥伦比亚和一个数学模型的Rhodnius prolixus动态。该模型使我们能够模拟昆虫的流动性和分布在村庄的基础上实地结果。我们创建了11个场景，代表了不同数量的光在村里（从0到100%，增量为10%），100个模拟每个时间为1000天（2.7年），并比较结果之间的scenaries.Results：没有戈麦斯-努涅斯陷阱是积极的，在任何阶段的研究，这表明昆虫不殖民房屋。该模型预测，在目前的村庄连接中，有昆虫来访的房屋比例应该在98%左右。此外，我们表明，增加光允许昆虫传播和迁移到以前un-infestedareas.Conclusions：增加光可以增加病媒和人类之间的接触率;增加30%的使用和可见度的光在这个特定的村庄，估计与模型的人类病例增加了两倍。
Background: Chagas disease is the most important vector-borne disease in Latin America and Rhodnius prolixus is the main vector in Colombia. Control strategies in this region have shown poor outcomes due to the insect's ability to disperse between the sylvatic and the domestic habitat. Because insect migration to houses is responsible to sustain contact rates between vectors and humans, understanding the risk factors that promote migration could be important in designing control strategies. In this respect, it has been reported that adult triatomines have the ability to move over long ranges at night attracted by artificial light. Thus, light bulbs could be playing a critical role in house invasion. The main objective of this study is to understand the role of artificial light, or simply light, in house infestation by R. prolixus.Methods: To investigate the role of light, we combined fieldwork in the village of Chavinave, Casanare, Colombia and a mathematical model of Rhodnius prolixus dynamics. The model allowed us to simulate insect mobility and distribution in the village based on field results. We created 11 scenarios representing different amounts of light in the village (from 0 to 100 %, with increments of 10 %) with 100 simulations each for a time of 1000 days (2.7 years) and compare the results between the scenarios.Results: None of the Gomez-Nunez traps were positive at any stage of the study, suggesting that insects do not colonize houses. The model predicts that with current village connections the proportion of houses that have visiting insects should be around 98 %. Additionally we showed that an increase in light allows for insect spreading and migration to previously un-infested areas.Conclusions: Increments in light could increase the contact rates between vectors and humans; a two-fold increase in human cases for a 30 % increase in the use and visibility of light on this particular village was estimated with the model.