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目的了解某中学诺如病毒感染性腹泻暴发的特点和流行原因,总结暴发疫情调查处理的经验。方法按照病例定义开展病例搜索,采用描述性流行病学和回顾性队列研究方法进行分析,样本采用RT-PCR方法检测诺如病毒核酸。结果该起感染性腹泻事件发病17人,罹患率为1.9‰。采集腹泻患者粪便样本9份,RT-PCR核酸检测阳性7份;学校剩余食物及环境相关样本13份均为阴性。结论根据现场流行病学调查及实验室检测结果,认定该事件为一起诺如病毒感染引起的腹泻暴发。
Objective To understand the characteristics and causes of outbreaks of Norovirus virus diarrhea in a middle school and summarize the experience of outbreak investigation and treatment. Methods Case search was performed according to the definition of case, and the methods of descriptive epidemiology and retrospective cohort were used to analyze the samples. RT-PCR was used to detect Norovirus nucleic acid. Results The incidence of infectious diarrhea in 17 people, the attack rate was 1.9 ‰. Nine samples of stool samples from patients with diarrhea were collected and seven were positive for RT-PCR. The remaining samples of school food and 13 samples from the environment were negative. Conclusions According to the field epidemiological investigation and laboratory test results, the incident was identified as an outbreak of diarrhea caused by Norovirus infection.