Abstract：Objective To analyze the epidemic characteristics of malaria in Haikou City from 1951 to 2019, and to provide a scientific basis for evaluating the effect of malaria control and formulating prevention and control strategies and measures after the elimination of malaria. Methods The epidemic situation and epidemiological survey data about malaria cases in Haikou City from 1951 to 2019 were analyzed by descriptive methods. Results A total of 34,408 cases of malaria were reported in Haikou City from 1951 to 2019, and the epidemic experienced a rapid rise to a rapid decline. The epidemic showed a rapid rise from 1951 to 1955, and the annual incidence rate increased from 273.08/100,000 to 1,746.70/100,000. The epidemic showed a rapid decline in 1956 and was under effective control in 1965, and the annual incidence rate fell from 860.70/100,000 to 7.92/100,000. The annual incidence rate from 1966 to 2019 was 0-14.70/100,000. A total of 441 cases were reported from 1991 to 2019. The proportions of vivax malaria, falciparum malaria, ovale malaria and undivided malaria were 70.07%, 14.74%, 0.45% and 14.74% respectively. The peak incidence of malaria was mainly concentrated in summer and autumn, accounting for 79.59%. The ratio of male to female patients was 5.21:1, and the top four occupations were migrant workers (36.05%), workers (12.02%), farmers (10.43%) and students (10.43%). Conclusion The malaria epidemic in Haikou City had been effectively controlled. Vivax malaria was the main type of the cases, and the peak period was from June to October. Most of the cases were young adult males aged 20-40 years. Strengthening the monitoring of imported cases and health education of key population will be the key work in future.
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2021, Vol. 28 
