Climate factors and the East Asian summer monsoon may drive large outbreaks of dengue in China

Environ Res. 2020 Apr:183:109190. doi: 10.1016/j.envres.2020.109190. Epub 2020 Feb 1.

Abstract

Objective: To investigate the relationship between climate variables, East Asian summer monsoon (EASM) and large outbreaks of dengue in China.

Methods: We constructed ecological niche models (ENMs) to analyse the influence of climate factors on dengue occurrence and predict dengue outbreak areas in China. Furthermore, we formulated a generalised additive model (GAM) to quantify the impact of the EASM on dengue occurrence in mainland China from 1980 to 2016.

Results: Mean Temperature of Coldest Quarter had a 62.6% contribution to dengue outbreaks. Southern China including Guangdong, Guangxi, Fujian and Yunnan provinces are more vulnerable to dengue emergence and resurgence. In addition, we found population density had a 68.7% contribution to dengue widely distribution in China using ENMs. Statistical analysis indicated a dome-shaped association between EASM and dengue outbreak using GAM, with the greatest impact in the South-East of China. Besides, there was a positive nonlinear association between monthly average temperature and dengue occurrence.

Conclusion: We demonstrated the influence of climate factors and East Asian summer monsoon on dengue outbreaks, providing a framework for future studies on the association between climate change and vector-borne diseases.

Keywords: Climate variables; Dengue; EASM; Ecological niche model; Generalised additive model.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • China / epidemiology
  • Climate Change*
  • Dengue* / epidemiology
  • Disease Outbreaks
  • Humans
  • Rain
  • Seasons*