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目的:对学校发生的一起不明原因呕吐、腹泻暴发疫情进行调查,查找病原和传播因素,总结暴发疫情调查处理的经验。方法:采用现场流行病学调查方法搜索相关病例并根据病人的症状、流行病学调查资料和PCR方法检验结果确定本起疫情。结果:累计发生93例,总体罹患率为9.39%(93/990),其中学生76人,罹患率为8.13%(76/935),教师及后勤工作人员共17人,罹患率为30.91%(17/55)。所采集的部分病例标本经过检测查出GII诺如病毒。结论:本次疫情为一起诺如病毒引起的暴发疫情,日常生活接触是疫情传播的主要方式。采取隔离病人、环境整治消毒、加强食堂管理等方法是控制疫情的关键。
OBJECTIVE: To investigate an epidemic of unknown causes of vomiting and diarrhea in schools, search for pathogens and transmission factors, and summarize the experience of outbreak investigation and treatment. Methods: The field epidemiological survey method was used to search for relevant cases and the outbreak was confirmed according to the patient’s symptoms, epidemiological survey data and PCR test results. Results: A total of 93 cases were found with 93.99% (93/990) of the total. Among them, 76 were students, the attack rate was 8.13% (76/935), the total number of teachers and back-office workers was 17, the attack rate was 30.91% 17/55). Part of the collected specimens were tested to detect GII Norovirus. Conclusions: The outbreak is a outbreak caused by Norovirus. The daily life contact is the main mode of epidemic spread. To isolate patients, environmental sanitation and disinfection, canteens and other methods to strengthen control of the epidemic is the key.