Abstract: Objective To analyze the epidemiological characteristics of malaria in Leshan City， so as to provide the evidence for formulating the strategy and measures for consolidating the achievements of malaria elimination. Methods The data of epidemiological characteristics of malaria in Leshan City from 1950 to 2015 were collected and analyzed with the descriptive epidemiology method. Results There were four larger scale epidemics of malaria in Leshan City from 1950 to 2015. The order of malaria in infectious diseases dropped from the first to the twentieth. The peak season for malaria epidemics ceased. The Plasmodium species， patient age， occupation and sex distribution of malaria were different in the different periods. In November 2016， the whole city achieved the national standard for malaria elimination. Conclusions After years of prevention and control， the epidemiological characteristics of malaria have changed significantly in Leshan City， and the effect of anti?malarial measures is significant. In the future， we should strengthen the monitoring， and prevention and control of imported malaria.

Key words: Malaria； Epidemic situation； Epidemiological characteristics； Leshan City

摘要： 目的 分析四川省乐山市疟疾流行病学特征，为巩固消除疟疾成果提供策略和措施依据。方法 采用描述性流行病学方法对1950-2015年疟疾流行特征进行分析。结果 1950-2015年全市疟疾出现过4次较大规模流行，疟疾在传染病中的顺位由过去的首位降至目前的第20位；疟疾流行的季节高峰已不复存在；不同时期疟疾流行的虫种，以及患者年龄、职业、性别分布均有不同。2016年11月以市为单位达到消除疟疾标准。结论 经过多年防治，全市疟疾流行特征已发生明显改变，各项防疟措施效果显著，今后应加强监测和输入性疟疾的防控。

关键词: 疟疾；疫情；流行特征；乐山市