Journal of Tropical Diseases and Parasitology ›› 2025, Vol. 23 ›› Issue (4): 199-204,210.doi: 10.20199/j.issn.1672-2302.2025.04.002

• SPECIAL TOPIC ON DENGUE FEVER PREVENTION AND CONTROL • Previous Articles     Next Articles

Epidemiological characteristics and prediction of overseas imported dengue fever in Yunnan Province from 2005 to 2023

FU Jialu1(), ZHENG Erda2(), QI Yanbo2, WU Linbo3, HE Jibo2(), YANG Rui3()   

  1. 1. School of Public Health, Dali University, Dali 671003, Yunnan Province, China
    2. Yunnan Center for Disease Control and Prevention
    3. Yunnan Institute of Parasitic Diseases
  • Received:2025-06-30 Online:2025-08-20 Published:2025-09-19
  • Contact: HE Jibo, E-mail: ynhejibo@163.com; YANG Rui, E-mail: jody877@163.com

Abstract:

Objective To analyze the epidemiological characteristics of overseas imported dengue fever cases in Yunnan Province, and predict the incidence trend for evidence for prevention and control of dengue fever. Methods Case data of overseas imported dengue fever reported in Yunnan Province from 2005 to 2023 were obtained from the Chinese Disease Prevention and Control Information System, and descriptive research methods were used to analyze the epidemiological characteristics of this infection. The SARIMA model was fitted using the case data from 2005 to 2023, and the model was evaluated with the case data of 2024. Results A total of 6 030 overseas imported dengue fever cases were reported in Yunnan Province from 2005 to 2023, which accounted for 19.50% of the total reported cases of dengue fever. The peak period for the imported cases was from August to November (5 094 cases, 84.48%). The top three prefectures/municipalities with the highest case number were Dehong Dai and Jingpo Autonomous Prefecture (2 610 cases, 43.28%), Xishuangbanna Dai Autonomous Prefecture (1 688 cases, 27.99%), and Lincang City (918 cases, 15.22%). The main source country of the cases was Myanmar (4 907 cases, 81.38%). The number of male and female cases was 3 477 (57.66%) and 2 553 (42.34%), respectively. The cases were mainly concentrated in the age group of 20-49 years (4 063 cases, 67.38%), and farmers were dominant in the cases reported (2 575 cases, 42.70%). The SARIMA(1,0,1)(1,0,1)12 model demonstrated excellent fitting effect, with the actual monthly case counts in 2024 all lying within the 95% confidence interval of the model’s forecasts. Conclusion Overseas imported dengue fever cases in Yunnan Province exhibited distinct seasonality, mainly originating from Myanmar and concentrating in Dehong Dai and Jingpo Autonomous Prefecture and Xishuangbanna Dai Autonomous Prefecture. It is recommended to strengthen dengue prevention and control measures for key inbound populations in line with seasonal and regional characteristics. Additionally, the SARIMA(1,0,1)(1,0,1)12 model can well fit the monthly number of overseas imported dengue fever cases in Yunnan Province, making it suitable for short-term prediction of the incidence trend of such cases.

Key words: Dengue fever, Overseas imported case, Epidemiology characteristics, Autoregressive integrated moving average model, Yunnan Province

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