Abstract：Objective To analyze the epidemic features of imported cases from overseas in Hunan Province during 2016-2021 so as to provide a scientific basis for the continuous optimization and implementation of malaria control work in Hunan Province. Methods Data about the malaria epidemic in Hunan Province from 2016 to 2021 were collected and analyzed by Microsoft Excel 2017 software. Results A total of 547 laboratory-confirmed malaria cases were reported in Hunan Province during 2016-2021, including 389 cases infected with Plasmodium falciparum (P. falciparum), 93 cases infected with Plasmodium vivax (P. vivax), 43 cases with Plasmodium ovale (P. ovale), 12 cases with Plasmodium malariae (P. malariae) and 10 cases of mixed species malaria infections. There were 542 imported cases from overseas, 4 secondary transmitted cases of importedP. vivax, and 1 case infected by blood transfusion. No indigenous cases were reported. 92.25% of the imported cases from overseas were from Africa, and 6.64% of the cases from Southeast Asia. In addition, 5 cases were from Papua New Guinea in Oceania, and 1 case fromQuyana in South America. The top 5 cities (prefectures) with highest number of malaria cases reported were Changsha, Shaoyang, Huaihua, Changde and Chenzhou. 97.07% of the cases fell into the age range of 20-59 years, with a male-to-female ratio of 27.8:1. The occupation distribution showed that farmers accounted for 37.29%, and workers for 19.74%. 85.74% of the cases were confirmed by medical institutions, of which the municipal- and county-level medical institutions were the main units. The case reporting rate within 24 hours, the case epidemiological survey rate within 3 days and the epidemic site disposal rate within 7 days were 100.00%, 95.80% and 100.00% respectively. All cases received standard treatment, and no death occurred. Conclusion Hunan Province has made remarkable achievements in malaria elimination. In order to consolidate the achievements, we should continue to strengthen the monitoring and management of imported malaria from overseas for preventing re-establishment of imported malaria transmission.
2023, Vol. 30 
