A country bug in the city: urban infestation by the Chagas disease vector Triatoma infestans in Arequipa, Peru.
A country bug in the city: urban infestation by the Chagas disease vector Triatoma infestans in Arequipa, Peru.
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DOI：
10.1186/1476-072x-12-48
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发表时间：
2013-10-30
影响因子：
4.9
通讯作者：
Chagas Disease Working Group in Arequipa, Peru
中科院分区：
文献类型：
--
作者：
Delgado S;Ernst KC;Pumahuanca ML;Yool SR;Comrie AC;Sterling CR;Gilman RH;Náquira C;Levy MZ;Chagas Disease Working Group in Arequipa, Peru
在许多拉丁美洲国家，阻断克氏锥虫病媒传播仍然是一个未实现的目标。由于城市地区出现病媒昆虫，病媒控制的任务变得复杂。利用来自秘鲁阿雷基帕大规模病媒控制项目的数据，我们探索了鼠疫Triatoma infestans在城市和城郊景观中侵害的空间格局。采用多水平逻辑回归来评估家庭虫害与家庭和地方层面的社会环境措施之间的关系。在调查的37229户家庭中，有6982户（18.8%;95% CI: 18.4 - 19.2%）被感染。确定了80组虫害，面积从0.1公顷到68.7公顷不等，虫害家庭少则1户，多则1 139户。受感染家庭之间的空间依赖性在高达2000米的距离上是显著的。家庭感染与家庭和地区因素有关，包括住房密度、海拔、地表温度和地区类型。在病媒控制之前，在广泛的城市和城郊地区发现了高水平的感染，其特征具有空间异质性。一些环境和社会因素可能直接或间接地影响寄生弓形虫的生物学和行为，这些因素与寄生弓形虫的发生有关。城市环境中虫害的空间聚类可能对杀虫剂干预后病媒再次出现的监测和控制提出挑战并提供信息。
Interruption of vector-borne transmission of Trypanosoma cruzi remains an unrealized objective in many Latin American countries. The task of vector control is complicated by the emergence of vector insects in urban areas. Utilizing data from a large-scale vector control program in Arequipa, Peru, we explored the spatial patterns of infestation by Triatoma infestans in an urban and peri-urban landscape. Multilevel logistic regression was utilized to assess the associations between household infestation and household- and locality-level socio-environmental measures. Of 37,229 households inspected for infestation, 6,982 (18.8%; 95% CI: 18.4 – 19.2%) were infested by T. infestans. Eighty clusters of infestation were identified, ranging in area from 0.1 to 68.7 hectares and containing as few as one and as many as 1,139 infested households. Spatial dependence between infested households was significant at distances up to 2,000 meters. Household T. infestans infestation was associated with household- and locality-level factors, including housing density, elevation, land surface temperature, and locality type. High levels of T. infestans infestation, characterized by spatial heterogeneity, were found across extensive urban and peri-urban areas prior to vector control. Several environmental and social factors, which may directly or indirectly influence the biology and behavior of T. infestans, were associated with infestation. Spatial clustering of infestation in the urban context may both challenge and inform surveillance and control of vector reemergence after insecticide intervention.