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| Characteristics of imported malaria cases in Jinhua City from 2010 to 2024 |
| ZHANG Tao, HU Yueqiang, ZHANG Guangming, DU Zhiping, WANG Zuoyi, WANG Junling
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| Jinhua Center for Disease Control and Prevention, Jinhua, Zhejiang 321000, China |
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Abstract Objective To analyze the characteristics of imported malaria cases in Jinhua City, Zhejiang Province from 2010 to 2024, so as to provide a basis for consolidating the achievements of malaria elimination and improving prevention and control measures. Methods Data on imported malaria cases in Jinhua City from 2010 to 2024 were collected through the Parasitic Disease Prevention and Control Information Management System of the Chinese Center for Disease Control and Prevention Information System, including basic information such as gender, age, household registration, and occupation, as well as data on disease onset, healthcare-seeking behavior, and epidemiological history. Descriptive analysis was conducted on the sources of importation, temporal distribution, population distribution, regional distribution, and the interval from disease onset to healthcare-seeking among imported malaria cases. The average annual percent change (AAPC) was used to analyze the trend in reported incidence of imported malaria in Jinhua City from 2010 to 2024. Results A total of 581 imported malaria cases were reported in Jinhua City from 2010 to 2024, with Plasmodium falciparum malaria being the predominant type, accounting for 476 cases (81.93%). The average annual reported incidence of imported malaria in Jinhua City from 2010 to 2024 was 0.48/105, with no statistically significant overall trend (P>0.05). The majority of cases were imported from Africa, accounting for 532 cases (91.57%). A higher number of cases were reported from July to October, accounting for 258 cases (44.41%). Yiwu City reported the highest number of cases, accounting for 395 cases (67.99%). The majority of cases were males, accounting for 492 cases (84.68%), and aged 20-50 years, accounting for 487 cases (83.82%). The interval from disease onset to healthcare-seeking was more than 3 days in the majority of cases, accounting for 267 cases (45.96%). The median interval from onset to healthcare-seeking for non-Plasmodium falciparum malaria cases was 3.33 (interquartile range, 3.25) days, which was longer than that for Plasmodium falciparum malaria cases 3.00 (interquartile range, 3.00) days (P<0.05). Conclusions The overall trend in reported incidence of imported malaria in Jinhua City from 2010 to 2024 remained stable. The cases were predominantly Plasmodium falciparum malaria and imported from Africa. A higher incidence was observed in summer and autumn, in Yiwu City, and among males and young adults. The interval from disease onset to healthcare-seeking was longer for non-Plasmodium falciparum malaria cases.
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Received: 05 November 2025
Revised: 30 March 2026
Published: 21 April 2026
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