目的了解该乡镇甲肝暴发疫情情况,描述其流行病学特征,查明此次疫情暴发原因,为当地有关部门针对性采取相关措施控制疫情继续蔓延提供依据。方法建立病例定义,开展病例搜索,运用流行病学基本方法,对2012年6~11月该乡镇甲肝暴发疫情资料进行统计分析,针对危险因素开展病例对照研究。结果该乡镇甲肝疫情呈现空间和时间相对聚集,病例年龄3~42岁,平均年龄9岁左右;职业以学生最多,农民(工)居次;主要集中在3个自然村和1个小学,出现多个家庭、自然村聚集,54.00%的病例之间有流行病学联系;报告发病时间以9月最多,10月为次。流行曲线提示暴发为人传人增殖模式。结论该乡镇甲肝疫情已达突发公共卫生事件相关信息报告标准,本次暴发的主要原因是出现甲肝病人后未及时诊断、报告,有效隔离、控制;当地部分居民在饮食、饮水和洗手等个人综合卫生方面存在不良的行为习惯。 Objective To understand the outbreak of hepatitis A in the township, describe its epidemiological characteristics and identify the causes of the outbreak. It provides the basis for relevant departments to take appropriate measures to control the spread of the epidemic. Methods To establish a case definition, carry out case search and use epidemiological methods to analyze the data of the outbreak of hepatitis A in this township from June to November in 2012 and carry out a case-control study on the risk factors. Results The incidence of hepatitis A in the township showed relative spatial and temporal accumulation. The cases were between 3 and 42 years old, with an average age of about 9 years. Occupation was dominated by students and farmer (worker), followed by three villages and one primary school There were epidemiological links between 54.00% of cases and families and natural villages. The most frequent reported cases were in September and October. Pop curves suggest outbreaks of human proliferation mode. Conclusion The outbreak of hepatitis A in the township has reached the standard of reporting information related to public health emergencies. The main reason for this outbreak is the failure to timely diagnose, report and effectively isolate and control hepatitis A patients. Individuals in local areas such as people who eat, drink and wash hands There are bad habits in general health.