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Effects of natural and socioeconomic factors on dengue transmission in two cities of China from 2006 to 2017
Science of the Total Environment ( IF 5.589 ) Pub Date : 2020-03-24 , DOI: 10.1016/j.scitotenv.2020.138200
Ying Chen; Zefeng Yang; Qinlong Jing; Jiayin Huang; Cheng Guo; Kailiang Yang; Aizhen Chen; Jiahai Lu

Dengue fever (DF) is a common and rapidly spreading vector-borne viral disease in tropical and subtropical regions. In recent years, in China, DF still poses an increasing threat to public health in many cities; but the incidence shows significant spatiotemporal differences. The purpose of this study was to identify the key factors affecting the spatial and temporal distribution of DF. We collected natural environmental and socio-economic data for two adjacent cities, Guangzhou (73 variables) and Foshan (71 variables), with the most DF cases in China. We performed random forest modelling to rank the factors according to their level of importance, and used negative binomial regression analysis to compare the risk factors between outbreak years and non-outbreak years. The natural environmental factors contributing to DF incidence for Guangzhou were temperature (relative risk (RR) = 18.80, 95% confidence interval (CI) = 3.11–113.67), humidity (RR = 1.85, 95% CI = 1.17–2.90) and green area (RR = 12.11, 95% CI = 6.14–55.50), and for Foshan was forest coverage (RR = 5.83, 95% CI = 2.72–12.45). Socio-economic impact were shown in Guangzhou with foreign visitor (RR = 1.18, 95% CI = 1.05–1.34) and oversea air passenger transport (RR = 7.34, 95% CI = 2.26–23.86); in Foshan, with oversea tourism (RR = 1.65, 95% CI = 1.34–2.04); and in Guangzhou-Foshan, with the development of intercity metro (RR = 1.26, 95% CI = 1.10–1.44). The difference between the two cities was the greater impact of the foreign visitor, green spaces and climate factor on DF in Guangzhou; the impact of the construction of intercity metro; and the more significant impact of oversea tourism on DF in Foshan. Our results suggest meaningful clues to public health authorities implementing joint interventions on DF prevention and early warning, to increase health education on DF prevention for international visitors and oversea travelers, and cross-city metro passengers; using rapid body temperature detection in public places such as airports, metros and parks can help detect cases early.
更新日期:2020-03-26

 

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