深圳市某大型工厂发生诺如病毒腹泻暴发的调查

Investigation on an Outbreak of Diarrhea Caused by Norovirus Infection in a Large Factory of Shenzhen

目的调查深圳市松岗街道内某公司诺如病毒感染性腹泻暴发原因及处理对策。方法采用现场流行病学调查分析和实验室检测方法。结果 2009年9月21日—10月3日,该公司总发病258例,临床诊断病例248例,实验室确诊病例10例;男168例,女90例;厨房、各厂房、各宿舍均有发病。全厂罹患率为1.81%,男女罹患率分别为2.13%和1.33%,无住院病例,无死亡病例。厂务部和厨房员工罹患率较高,分别为50.00%、24.64%;45岁-组罹患率最高,为26.67%。在病人粪便、直饮水水源中检测到诺如病毒抗原。结论该次疫情为一起水源性诺如病毒感染性腹泻暴发。建议市政自来水公司直接提供一切生活饮用水。

[Objective] To investigate the cause and countermeasures of an outbreak of diarrhea caused by Norovirus infection in a company of Songgang block in Shenzhen.[Methods]The field epidemiological investigation and laboratory detection methods were adopted.[Results]From September 21 to October 3 in 2009,there were 258 cases in this company.248 cases were clinically diagnosed,and 10 cases were confirmed by laboratory detection.There were 168 male cases and 90 female cases.The cases were occurred in the kitchen,every workshop and dormitory.The attack rate of the whole plant was 1.81%,that of male and female workers was 2.13% and 1.33% respectively,and there was no hospitalized case and death case.The attack rate of workers in plant department and kitchen was high,which reached 50.00% and 24.64% respectively.The attack rate of workers over 45 years old（26.67%） was the highest.The Norovirus antigen was detected in feces of patients and water source of direct drinking water.[Conclusion]This is an outbreak of infectious diarrhea caused by Norovirus in water source.It is suggest that municipal water supply company should provide all living and drinking water directly.