Journal of Tropical Diseases and Parasitology ›› 2024, Vol. 22 ›› Issue (2): 83-88.doi: 10.3969/j.issn.1672-2302.2024.02.004

• TOPICS ON VECTOR-BORNE DISEASES • Previous Articles     Next Articles

Analysis of the epidemiological characteristics of dengue fever in Jinghong City, China-Myanmar border region by spatial-temporal multicomponent model

TANG Yerong1,2(), ZHOU Hongning1(), LI Jinghua2,3, XIAO Jianpeng4   

  1. 1. Yunnan Innovative Team of Key Techniques for Vector-borne Disease Control and Prevention; Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research; Yunan International Joint Laboratory of Tropical Infectious Diseases; Yunnan Institute of Parasitic Diseases, Pu’er 665000, Yunnan Province, China
    2. School of public health, Sun Yat-sen University
    3. Global Health Research Center, Sun Yat-sen University
    4. Guangdong Provincial Center for Disease Control and Prevention; Guangdong Provincial Institution of Public Health
  • Received:2023-11-30 Online:2024-04-20 Published:2024-04-30
  • Contact: ZHOU Hongning, E-mail: zhouhn66@163.com

Abstract:

Objective To understand the spatial and temporal distribution characteristics of dengue fever and the factors affecting the dengue transmission in Jinghong City located in the China-Myanmar border area in 2019. Methods The daily incidences of dengue fever were initially collected in Jinghong City in 2019. Then the spatial-temporal multicomponent model on the Power-law algorithm basis was developed using population density, GDP per capita, daily average temperature, daily average relative humidity and sunshine hours as covariates to analyze the spatial and temporal transmission characteristics of dengue fever in different regions. The fitting effect of the model was evaluated by the Akaike information criterion(AIC) values. Results In 2019, a total of 3 303 local cases of dengue fever were reported in Jinghong City, with an incidence of 763.44/100 000 population. The spatio-temporal multicomponent model showed the best fitting effect if GDP per capita was included in the autoregressive compartment, population density, daily average temperature, daily mean maximum temperature and daily average relative humidity were included in the endemic compartment (AIC=2 317). At this point, the autoregressive compartment, the epidemic component and the endemic compartment were 0.215 1 [95% CI: (0.081 2, 0.570 2)], 0.000 4 [95% CI: (0.000 2, 0.001 0)] and 3.015 2 [95% CI: (1.650 7, 5.507 8)], respectively. The strength of effect of the covariates was 2.815 9 [95% CI: (0.021 6, 367.168 5)], 1.822 7 [95% CI: (1.497 6, 2.218 3)], 1.208 8 [95% CI: (1.057 7, 1.381 6)], 0.356 1 [95% CI: (0.011 9, 10.673 9)] and 0.310 4 [95% CI: (0.003 6, 126.548 2)] respectively for the average daily relative humidity, population density, GDP per capita, mean daily air temperature, and mean daily maximum temperature. Analysis on the incidence over 20 cases in an area demonstrated autocorrelation component produced greater effect on the incidence in Yunjinghong Community, Xishuangbanna Tourist Resort and Jinghong Industrial Park. However, the endemic compartment of Gasa Town, Menglong Town and Menghan Town were relatively large. Conclusion Dengue fever prevalence varies in different areas in Jinghong City, with spatial-temporal transmission trends. GDP per capita may lead to following epidemic from previous situation of dengue fever prevalence, and population density, daily average temperature, daily mean maximum temperature and daily average relative humidity can result in the risks of dengue fever epidemic in the local area.

Key words: Dengue fever, Border area of China-Myanmar, Jinghong City, Spatial-temporal multicomponent model

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