São Paulo urban heat islands have a higher incidence of dengue than other urban areas

Brazilian Journal of Infectious Diseases

Capurro, Margareth Lara¹  Cardoso, Vivian Ailt²  Franceschi, Nathália Cristina Soares²  Allegro, Vera Lúcia Anacleto Cardoso²  Bastos, Nancy Marçal²  Castro, Bronislawa Ciotek²  Albertini, Marcos Roberto²  Katz, Gizelda²  Araujo, Ricardo Vieira³  Costa-da-Silva, André Luis¹  Suesdek, Lincoln¹ 

[1] Universidade de São Paulo, São Paulo, Brazil;Secretaria Municipal de Saúde de São Paulo, São Paulo, Brazil;Ministério da Ciência, Tecnologia & Inovação, Brasília, Brazil

关键词: Urban heat islands;    Land surface temperature;    Vegetation cover;    Dengue;    Aedes aegyptiIntroductionUrban heat islands (UHI) are areas with minimal vegetation cover and large man-made surfaces (e;   

DOI  :  10.1016/j.bjid.2014.10.004

来源: Contexto

【 摘 要 】

Urban heat islands are characterized by high land surface temperature, low humidity, and poor vegetation, and considered to favor the transmission of the mosquito-borne dengue fever that is transmitted by the Aedes aegypti mosquito. We analyzed the recorded dengue incidence in Sao Paulo city, Brazil, in 2010-2011, in terms of multiple environmental and socioeconomic variables. Geographical information systems, thermal remote sensing images, and census data were used to classify city areas according to land surface temper- ature, vegetation cover, population density, socioeconomic status, and housing standards. Of the 7415 dengue cases, a majority (93.1%) mapped to areas with land surface temperature >28 ◦ C. The dengue incidence rate (cases per 100,000 inhabitants) was low (3.2 cases) in high vegetation cover areas, but high (72.3 cases) in low vegetation cover areas where the land surface temperature was 29 ± 2 ◦ C. Interestingly, a multiple cluster analysis phenogram showed more dengue cases clustered in areas of land surface temperature >32 ◦ C, than in areas characterized as low socioeconomic zones, high population density areas, or slum-like areas. In laboratory experiments, A. aegypti mosquito larval development, blood feeding, and oviposition associated positively with temperatures of 28-32 ◦ C, indicating these temperatures to be favorable for dengue transmission. Thus, among all the variables studied, dengue incidence was most affected by the temperature.

【 授权许可】

Unknown