Biology Department, University of North Carolina at Greensboro, Greensboro, NC 27412, U.S.A.
Mosquito and Vector-borne Infectious Disease Laboratory, Environmental Health Sciences Program, Western Carolina University, Cullowhee, NC 28723, U.S.A.
J Vector Ecol. 2021 Jun;46(1):34-47. doi: 10.52707/1081-1710-46.1.34.
Anthropogenic land-use change may affect the transmission risk for endemic vector-borne diseases such as La Crosse encephalitis. In this study, we applied a comparative ecological approach to evaluate differences in vector species abundance, gonotrophic status, and environmental variables among six residential habitats (historical case houses) and six paired adjacent forest patches in a La Crosse virus endemic area of North Carolina. A total of 93,158 container spp. eggs were obtained by ovistrips and 1,040 resting mosquito adults were collected by large-bore aspiration from 10 June through 8 October, 2010. At sites characterized by high densities of artificial containers, the totals of eggs and adult mosquitoes were higher in the peridomestic plots. At sites characterized by lower densities of artificial containers, the totals of eggs and adult mosquitoes were higher in the forested plots. Although , the primary La Crosse virus vector, was more commonly found in forested habitat overall, in sites characterized by high density of artificial containers, it was found in higher abundance in the peridomestic habitat. Similarly, the proportion of gonotrophically active (parous and gravid) mosquitoes was higher in the peridomestic habitat for sites with highartificial container density. Our study suggests that La Crosse virus transmission risk may be higher at peridomestic habitats with higher densities of artificial containers and thus reinforces the importance of public health measures to improve source reduction efforts
人为土地利用变化可能会影响地方性媒介传播疾病（如拉科萨脑炎）的传播风险。在这项研究中，我们应用比较生态学方法，评估了北卡罗来纳州拉科萨病毒流行区 6 个住宅栖息地（历史病例房屋）和 6 个配对相邻森林斑块中媒介物种丰度、生殖状态和环境变量的差异。通过卵带法共获得 93158 个容器蚊卵，用大口径吸引法从 2010 年 6 月 10 日至 10 月 8 日共采集到 1040 只静止蚊子成虫。在人工容器密度高的地点，半家域的卵和成年蚊子总数较高。在人工容器密度较低的地点，森林斑块的卵和成年蚊子总数较高。尽管 是拉科萨病毒的主要媒介，但总体上在森林生境中更为常见，但在人工容器密度高的地点，在半家域中的丰度更高。同样，在人工容器密度高的地点，半家域中生殖活跃（产卵和怀孕）的蚊子比例更高。我们的研究表明，在人工容器密度较高的半家域中，拉科萨病毒传播风险可能更高，因此加强公共卫生措施来改善源头减少工作的重要性。
