De Azevedo Thiago S, Bourke Brian Patrick, Piovezan Rafael, Sallum Maria Anice M
Department of Epidemiology, Faculty of Public Health, University of São Paulo.
Geospat Health. 2018 May 8;13(1):623. doi: 10.4081/gh.2018.623.
We addressed the potential associations among the temporal and spatial distribution of larval habitats of Aedes (Stegomyia) aegypti, the presence of urban heat islands and socioeconomic factors. Data on larval habitats were collected in Santa Bárbara d'Oeste, São Paulo, Brazil, from 2004 to 2006, and spatial and temporal variations were analysed using a wavelet-based approach. We quantified urban heat islands by calculating surface temperatures using the results of wavelet analyses and grey level transformation from Thematic Mapper images (Landsat 5). Ae. aegypti larval habitats were geo-referenced corresponding to the wavelet analyses to test the potential association between geographical distribution of habitats and surface temperature. In an inhomogeneous spatial point process, we estimated the frequency of occurrence of larval habitats in relation to temperature. The São Paulo State Social Vulnerability Index in the municipality of Santa Barbára d'Oeste was used to test the potential association between presence of larval habitats and social vulnerability. We found abundant Ae. aegypti larval habitats in areas of higher surface temperature and social vulnerability and fewer larval habitats in areas with lower surface temperature and social vulnerability.
我们研究了埃及伊蚊（白纹伊蚊）幼虫栖息地的时空分布、城市热岛的存在与社会经济因素之间的潜在关联。2004年至2006年期间，在巴西圣保罗州的圣巴巴拉-杜埃斯特收集了幼虫栖息地的数据，并采用基于小波的方法分析了时空变化。我们利用小波分析结果和专题制图仪图像（陆地卫星5号）的灰度变换计算地表温度，从而对城市热岛进行量化。将埃及伊蚊幼虫栖息地进行地理定位，使其与小波分析相对应，以测试栖息地地理分布与地表温度之间的潜在关联。在一个非均匀空间点过程中，我们估计了幼虫栖息地相对于温度的出现频率。利用圣巴巴拉-杜埃斯特市的圣保罗州社会脆弱性指数，测试幼虫栖息地的存在与社会脆弱性之间的潜在关联。我们发现，在地表温度较高和社会脆弱性较高的地区，埃及伊蚊幼虫栖息地数量丰富，而在地表温度较低和社会脆弱性较低的地区，幼虫栖息地数量较少。
