掌握大连市疟疾流行特征，为防止疟疾消除后再传播提供依据。从国家传染病报告信息管理系统和寄生虫病防治信息管理系统收集大连市2014—2023年疟疾报告病例流行病学个案调查资料，采用描述性和分析性流行病学方法分析病例特征。2014—2023年大连市共报告疟疾病例125例，均为境外输入性病例，其中2例死亡。报告病例中恶性疟占85.6%（107/125），卵形疟占10.4%（13/125），三日疟占3.2%（4/125），间日疟占0.8%（1/125）。2014—2023年大连市年平均报告病例数12.5例，其中2017年报告病例数最多（25例）。各月均有病例报告，1月报告病例数最多（16.0%，20/125），无季节特征；各县（区）的常住居民均有病例报告，甘井子区最多（18.4%，23/125）。报告病例的感染来源分布于非洲的20个国家，输入数量最多的国家为尼日利亚（13.6%，17/125）。报告病例的男女性别比为10.36∶1，中位年龄为42岁；30~39岁年龄组的报告病例最多（28.0%，35/125），文化程度以初中学历最多（39.2%，49/125），职业分布为工人最多（31.2%，39/125）。报告病例自回国到发病时间间隔的中位数为7 d，自发病到确诊时间间隔的中位数为4 d。发病1 d内确诊的报告病例仅占4.8%（6/125），超过7 d确诊的占24.0%（30/125）。经市级医疗机构确诊的报告病例占88.0%（110/125）。大连市存在一定数量的境外输入性疟疾病例，以恶性疟为主。应加强输入性疟疾防控，提高临床医生诊断能力和居民对疟疾的认知，持续巩固消除疟疾成果。

To understand the epidemiological characteristics of malaria in Dalian City, so as to provide insights into prevention of re-establishment of malaria after elimination. Data pertaining to epidemiological individual investigations of reported malaria cases in Dalian City from 2014 to 2023 were retrieved from the National Information System for Infectious Diseases Surveillance and National Information System for Parasitic Diseases Control and Prevention, and the epidemiological features of reported malaria cases were analyzed using descriptive and analytical epidemiological methods. A total of 125 malaria cases were reported in Dalian City from 2014 to 2023, and all were overseas imported cases, including 2 deaths. Among all reported cases, falciparum malaria accounted for 85.6% (107/125), ovale malaria accounted for 10.4% (13/125), quartan malaria accounted for 3.2% (4/125) and vivax malaria accounted for 0.8% (1/125). The annual average number of reported malaria cases was 12.5 in Dalian City from 2014 to 2023, with the highest number of reported cases in 2017 (25 cases). Malaria cases were reported across all months, and the highest number of malaria cases was reported in January (16.0%, 20/125), without seasonal variations. Malaria cases were detected in permanent residents across all counties (districts) in Dalian City, with the highest number of cases seen in Ganjingzi District (18.4%, 23/125), and the reported malaria cases acquired infections from 20 countries in Africa, and the country where the highest number of malaria cases acquired infections was Nigeria (13.6%, 17/125). The male-to-female ratio of reported malaria cases was 10.36 : 1, and the reported cases had a median age of 42 years, with the highest number of reported cases at ages of 30 to 39 years (28.0%, 35/125). Of all reported malaria cases, junior high school was the predominant educational level (39.2%, 49/125), and worker was the predominant occupation (31.2%, 39/125). The median interval from returning to China to disease onset was 7 days and the median duration from disease onset to diagnosis was 4 days among reported malaria cases. Among all reported malaria cases, there were only 6 cases (4.8%) with definitive diagnosis within 1 day from disease onset, and 30 cases (24.0%) with definitive diagnosis exceeding 7 days from disease onset, and there were 110 cases (88.0%) with definitive diagnosis in city-level medical institutions. These findings demonstrate that there are overseas imported malaria cases in Dalian City, with falciparum malaria as the predominant type. It is recommended to reinforce the prevention and control of imported malaria, and increase clinicians’ diagnostic capability and residents’ awareness of malaria, in order to sustainably consolidate malaria elimination achievements.