Laboratório de Pesquisa Em Virologia, Faculdade de Medicina de São José Do Rio Preto, São José Do Rio Preto, SP, Brazil.
Department of Epidemiology, School of Public Health, University of Sao Paulo, São Paulo, SP, Brazil.
Parasit Vectors. 2022 Apr 19;15(1):133. doi: 10.1186/s13071-022-05244-4.
Mosquito control is currently the main tool available to contain the spread of several arboviruses in Brazil. We have evaluated the association between entomological surveys of female adult Aedes aegypti and the Breteau index (BI) in space and time in a hyperendemic area, and compared the human resources costs required to measure each of these indicators.
Entomological surveys were conducted between 2016 and 2019 in Vila Toninho, a neighborhood in the city of São José do Rio Preto, Brazil. Monthly records of collected mosquito specimens were made and then grouped by season.
Our findings showed that adult and immature mosquitoes are more related in time than in space, possibly due to differences in their habitats or in climate variables. Bayesian temporal modeling revealed that an increase in 1 standard deviation in the BI was associated with a 27% increase in the number of adult female mosquitoes when adjusted for climatic conditions. The cost of entomological surveys of adult mosquitoes was found to be 83% lower than the cost of determining the BI when covering the same geographic area.
For fine-scale assessments, a simple measure of adult Ae. aegypti abundance may be more realistic than aquatic indicators, but the adult indices are not necessarily the only reliable measure. Surveying adult female mosquitoes has significant potential for optimizing vector control strategies because, unlike the BI, this tool provides an effective indicator for micro-areas within an urban region. It should be noted that the results of the present study may be due to specific features of of the study area, and future studies should analyze whether the patterns found in the study neighborhood are also found in other regions.
蚊虫控制目前是巴西控制几种虫媒病毒传播的主要手段。我们评估了在高度流行地区蚊媒调查与布雷图指数（BI）在空间和时间上的相关性，并比较了测量这些指标所需的人力资源成本。
2016 年至 2019 年期间，在巴西圣若泽-杜里奥普雷托市的 Vila Toninho 街区进行了蚊媒调查。每月记录收集的蚊子标本，并按季节进行分组。
我们的研究结果表明，成年和未成熟蚊子在时间上的相关性大于空间上的相关性，这可能是由于它们的栖息地或气候变量的差异所致。贝叶斯时间模型表明，在调整气候条件后，BI 每增加 1 个标准差，成年雌性蚊子的数量就会增加 27%。当覆盖相同的地理区域时，与确定 BI 相比，成年蚊子的虫媒调查成本要低 83%。
对于精细评估，成年埃及伊蚊丰度的简单测量可能比水生指标更现实，但成虫指标不一定是唯一可靠的衡量标准。调查成年雌性蚊子对优化病媒控制策略具有重要潜力，因为与 BI 不同，这种工具为城市区域内的微观区域提供了有效的指标。需要注意的是，本研究的结果可能是由于研究区域的特定特征所致，未来的研究应分析在研究社区中发现的模式是否也存在于其他地区。
