Abstract: Objective To analyze the epidemic situation of imported malaria in Guangdong Province for ensuring long-term effect of the prevention and control strategies in our province. Methods Surveillance data of malaria were obtained and reviewed in Guangdong from 2011 to 2019. Results Totally, 1 524 imported malaria cases, including 1 147 (75. 26% ) of falciparum malaria, 218(14. 30% ) vivax malaria, 90 (5. 91% ) quartan malaria,30 (1. 97% ) Ovale malaria, 10 (0. 66% ) mixed malaria, 1 (0. 07% ) plasmodiumknowless, and 28 (1. 84% ) unclassified, were reported from 2011 to 2019 in Guangdong. 76. 97% (1 173 / 1 524) of the cases were scattered in 19 cities, and ranked top three by Guangzhou (790 cases, 51. 84% ), Shenzhen(297 cases, 19. 49% ) and Foshan(86 cases, 5. 64% ). The imported cases were primarily from Africa and Southeast Asia, including 312 cases ( 20. 47% ) from Nigeria, 126 ( 8. 27% ) from Ghana, and 99 (6. 50% ) from Cameroon. The ratio of male / female was 7. 51 ∶ 1, and 76. 25% of the cases were at age of 20 to 49 years in man. The infection was prominent in personnels in business service ( 25. 98% , 396 / 1 524), export workers( 24. 54% ,374 / 1 524), and housewifes or unemployed(9. 38% , 143 / 1 524), which accounted for 59. 91% (913 / 1 524) of the total reported cases. Of the 287 foreign malaria cases reported, 90. 24% were Africans, in whom 16. 38% (47 / 287) were Nigerians, 6. 97% (20 / 287) Angolans, and 6. 62% (19 / 287)Cameroonians. The most infection was associated with Plasmodium falciparum(85. 71% , 246 / 287), Plasmodium vivax(10. 1% , 29 / 287) and Plasmodium malariae(1. 74% , 5 / 287). Totally, 15 deathes were reported, yet no secondary infection occurred in the imported cases. Conclusion At present, the measures of malaria prevention and control in Guangdong Province appear still sensitive and effective. Nevertheless, imported cases have become the main threat in malaria control and prevention at present and in the future, which suggests that it is necessary to adjust the prevention and control strategies and continue to strengthen monitoring over the transmission and treatment of the patients.

Key words: Malaria, Imported cases, Prevention and control strategy, Guangdong Province