The influence of urban heat islands and socioeconomic factors on the spatial distribution of Aedes aegypti larval habitats

Submitted: 5 September 2017
Accepted: 22 January 2018
Published: 8 May 2018
Abstract Views: 2447
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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.

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Supporting Agencies

FAPESP (Grant 2014/26229-7), NIH AI R01110112, and CNPq (Grant 301877/2016-5, TSA and Grant 402054/2014-8).

How to Cite

de Azevedo, T. S., Bourke, B. P., Piovezan, R., & Sallum, M. A. M. (2018). The influence of urban heat islands and socioeconomic factors on the spatial distribution of Aedes aegypti larval habitats. Geospatial Health, 13(1). https://doi.org/10.4081/gh.2018.623