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Risk Factors for Imported Severe Malaria Cases - China, 2019-2023
1National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Health Commission Key Laboratory on Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai, China.
Imported malaria cases in China (2019-2023) were analyzed, revealing older age, African origin, Plasmodium falciparum infection, and delayed treatment as risk factors for severe malaria. Early identification and intervention are crucial for better outcomes.
Area of Science:
- Epidemiology
- Infectious Diseases
- Public Health
Background:
- Imported malaria poses a significant public health challenge in non-endemic regions.
- Understanding the characteristics of imported malaria is crucial for effective control strategies.
Purpose of the Study:
- To analyze the epidemiological features of imported malaria in China from 2019 to 2023.
- To identify risk factors associated with severe malaria cases for improved clinical management.
Main Methods:
- Retrospective analysis of national malaria case data from 2019-2023.
- Comparison of epidemiological and clinical characteristics between severe and non-severe malaria cases.
- Multivariate logistic regression to determine risk factors for severe malaria.
Main Results:
- A total of 7,892 imported malaria cases were reported, with 673 classified as severe.
- Severe malaria cases were associated with older age, African origin, Plasmodium falciparum infection, and recent overseas residence.
- Delays in seeking medical attention, diagnosis, and treatment were significantly longer in severe cases.
Conclusions:
- Key risk factors for severe malaria include patient demographics, geographic origin, Plasmodium species, and treatment timeliness.
- Monitoring these factors can aid in early clinical identification and intervention for severe malaria.
- Findings provide a basis for targeted malaria control and prevention efforts in China.
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