一起诺如病毒引起的学校感染性腹泻暴发调查

Investigation on an outbreak of infectious diarrhea caused by norovirus in a school

目的分析呼和浩特市某学校感染性腹泻暴发疫情的流行特征,查找病因和可能危险因素,采取措施控制疫情。方法对2020年11月呼和浩特市某旗报告的某中学感染性腹泻暴发疫情中的病例进行个案调查和现场流行病学调查。采集该次暴发疫情的相关标本进行检测。结果累计报告病例41例,均为学生,罹患率为1.09%,发病集中在11月26日—27日,初一年级发病最多。实验室检测结果显示,病例肛拭子诺如病毒核酸阳性7份、学生宿舍混合环境样本阳性1份。结论本次感染性腹泻暴发疫情由诺如病毒感染所致,控制疫情除及时采取隔离患者、进行食品安全管理、水安全管理等预防控制措施外,做好被污染环境消毒尤为重要。

Objective To analyze the epidemiological characteristics of an outbreak of infectious diarrhea in a school in Hohhot,find the etiology and possible risk factors,and take measures to control the epidemic.Methods Case investigation and field epidemiological investigation were conducted on the infectious diarrhea outbreak in a middle school reported in a banner of Hohhot in November 2020.Samples in the outbreak were collected for testing.Results A total of 41 cases were reported,all of them were students,and the attack rate was 1.09%.The incidence was mainly from 26 to 27,November,and the highest incidence was observed in the first grade of junior high school.The laboratory results showed that 7 samples were positive for norovirus nucleic acid testing in anal swabs and 1 mixed environment sample was positive in student dormitories.Conclusion The outbreak of infectious diarrhea was caused by norovirus infection.In addition to timely isolation of patients,food safety management,water safety management and other prevention and control measures,it is particularly important to do a good job of disinfecting the contaminated environment.