一起学校诺如病毒聚集性疫情的病例对照调查

刘红联; 汤泓; 夏仪; 梁倩倩; 方延; 庄建林

doi:10.19428/j.cnki.sjpm.2018.18658

一起学校诺如病毒聚集性疫情的病例对照调查

A case-control investigation on Norovirus aggregation in school

摘要

摘要:
目的对上海市某中学发生的一起诺如病毒感染性腹泻聚集性疫情进行调查和分析。
方法采用病例对照的调查方法，将所有病例作为病例组，将同班级内未发病学生作为对照组，以问卷调查的形式进行回顾性调查。同时采集部分病例标本进行实验室检测。
结果本次疫情共有19名学生出现呕吐、腹泻；病例对照调查提示学生秋游时食用的景区路边摊自制食品为可疑暴露因素(P=0.001)；7名患者粪便中检出诺如病毒核酸GⅡ型。
结论本次疫情为一起诺如病毒感染性腹泻聚集性疫情，可疑病因为学生秋游时食用的景区路边摊自制食品。

Abstract:
ObjectiveTo investigate and analyze the cause of an outbreak caused by Norovirus which happened at a middle school in Shanghai.
MethodsCase-control investigation method was used.Patients with gastroenteritis symptoms were defined as case group, and those without symptoms in the same class as control group.Retrospectives epidemiological investigation had been applied.Biological specimens of cases were tested in laboratory.
ResultsThere were a total of 19 students with vomit and(or) diarrhea symptoms.Case-control study showed that the risk factor might be one kind of homemade food sold from the stalls at the scenic spot (P=0.001), Norwalk virus RNA(type GⅡ) were detected from stool specimens of 7 patients.
ConclusionThe outbreak was probably caused by Norovirus, and the suspicious risk factor was contamination of homemade food from stalls at the scenic spot.

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