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Abstract：
OBJECTIVE: In December 2017, an acute gastroenteritis outbreak involving 61 students occurred in a boarding high school in Beijing, China. We conducted an outbreak investigation immediately in order to determine the cause of this outbreak and provide effective control measures.
RESULTS: The laboratory inspection showed that this outbreak was caused by GII.P16-GII.2 norovirus. Risk factor analysis indicated that the lunch provided by Cafeteria 1 on Dec 12 might be the risk factor of the outbreak with an odds ratio (OR) of 3.800 (95% confidence interval [CI] 1.089-13.258). Additionally, a tray line server of Cafeteria 1 was found to have gastro-enteral symptoms recently. Based on the clinical symptoms and epidemiology investigation, the symptomatic server was considered to be the possible source of infection.
RESULTS: The laboratory inspection showed that this outbreak was caused by GII.P16-GII.2 norovirus. Risk factor analysis indicated that the lunch provided by Cafeteria 1 on Dec 12 might be the risk factor of the outbreak with an odds ratio (OR) of 3.800 (95% confidence interval [CI] 1.089-13.258). Additionally, a tray line server of Cafeteria 1 was found to have gastro-enteral symptoms recently. Based on the clinical symptoms and epidemiology investigation, the symptomatic server was considered to be the possible source of infection.
摘要：
目的：2017年12月，北京一所寄宿制中学发生了61名学生的急性胃肠炎疫情，中国。我们立即进行了疫情调查，以确定此次疫情的原因并提供有效的控制措施。
结果：实验室检查显示，这次爆发是由GII引起的。P16-GII.2诺如病毒。危险因素分析表明，12月12日自助餐厅提供的午餐可能是爆发的危险因素，比值比（OR）为3.800（95％置信区间[CI]1.089-13.258）。此外,最近发现Cafeteria1的托盘行服务器有胃肠道症状。根据临床症状和流行病学调查,有症状的服务器被认为是可能的感染源.
结果：实验室检查显示，这次爆发是由GII引起的。P16-GII.2诺如病毒。危险因素分析表明，12月12日自助餐厅提供的午餐可能是爆发的危险因素，比值比（OR）为3.800（95％置信区间[CI]1.089-13.258）。此外,最近发现Cafeteria1的托盘行服务器有胃肠道症状。根据临床症状和流行病学调查,有症状的服务器被认为是可能的感染源.
