成都市某中学一起诺如病毒感染性腹泻疫情的报告

Investigation and Analysis of an Outbreak of Acute Gastroenteritis Caused by Norovirus Infection in a Certain Middle School of Chengdu

目的:通过调查处置一起诺如病毒引起的急性胃肠炎暴发疫情,分析疫情暴发的原因,并提出处置建议,为有效防控此类疫情提供依据。方法:采用描述性流行病学方法,收集学校基本情况和病例相关资料,进行流行病学特征分析,采集病例、食堂工作人员等粪便标本进行实验室检测。结果:此次疫情从2022年11月3日—22日结束,历时20天,共报告疑似病例342例,病例涉及多个年级和班级。实验室检测结果显示病例为诺如病毒GⅡ型核酸阳性。结论:此次疫情为一起诺如病毒GⅡ型感染引起的急性胃肠炎暴发疫情,传播途径是人与人的密切接触,病例在班级、寝室内呕吐可能是导致疫情暴发的主要原因。

OBJECTIVE To investigate and deal with an outbreak of acute gastroenteritis caused by norovirus,analyze the risk factors of the outbreak,and put forward control measures,so as to provide basis for effective prevention and control of this kind of epidemic.METHODS Field epidemiological investigation was used to collect the basic situation of schools and relevant data of children to analyze the epidemiological characteristics and collect fecal samples of cases and canteen staff for laboratory testing.RESULTS The epidemic lasted 20 days from November 3rd to 22th,2022.A total of 342 suspected cases were reported.The cases involved multiple grades and classes.The laboratory test results showed that norovirus GⅡnucleic acid was positive.CONCLUSION The outbreak is an outbreak of diarrhea caused by norovirus GⅡinfection.The route of transmission is due to close contact between people.Vomiting in classes and dormitories may be the main cause of the outbreak.