Urbanization and climate change likely to increase dengue risk in China

Significant land use changes have been taking place in China, particularly since the economic “Open Door” policy was implemented in 1978. Due to the development of special economic zones following this policy, the last four decades were characterized by rapid and unprecedented urbanization all over China. Meanwhile, since the first dengue outbreak in mainland China after China’s founding in 1949 was reported in 1978, China has been through dengue outbreaks of increasingly larger scales and a widening spatial distribution. Climate change, risk of imported cases, limited surveillance on dengue vectors, and increasing population migration, bring more pressure on the prevention and control of dengue in China. 

There are several pathways by which urbanization increases the risk of dengue. Urbanization could increase the risk of dengue by elevating the human-vector contacting rate, and higher distribution of Aeaegypti was also observed in urban areas. Our review identified that the regional hotspots of dengue epidemics were Guangdong Province and southern Taiwan.

The occurrence and spread of dengue result from a complex interplay of various factors such as meteorological variables, air pollutants, socioeconomic status, and demographic characteristics. Therefore, a holistic assessment based on time series analysis is needed at the regional level to prepare for future changes in climate and land-use on this important disease.

Read the full paper here: Gao P, Pilot E, Rehbock C, Gontariuk M, Doreleijers S, Wang L, Krafft T, Martens P, Liuet Q. (2021) Land use and land cover change and its impacts on dengue dynamics in China: A systematic review. PLoS Neglected Tropical Diseases 15(10).

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