江苏省苏州市某学校诺如病毒引起的腹泻暴发现场流行病学调查

Field epidemiologic survey of outbreak of norovirus infection in a middle school in Suzhou

摘要: 2014年3月17日,江苏省苏州市某学校学生出现腹泻暴发事件。现场流行病学调查共发现66例学生病例,罹患率为3.5%(66/1904)。流行曲线提示人传人模式。9个宿舍的首例病例在宿舍呕吐后,7个宿舍在潜伏期内有新病例出现(RR=15,95%CI:2.1~103)。实验室检测诺如病毒Ⅰ型阳性。患者呕吐产生的呕吐物污染可能是疫情在宿舍内传播的危险因素。学校应加强呕吐物的消毒处理。

Abstract: On 17 March 2014, an outbreak of diarrhea and vomiting occurred in a middle school in Suzhou, Jiangsu province. Field epidemiologic survey found 66 cases in 23 classes, the attack rate was 3.5%(66/1904). The incidence curves suggested a human to human transmission mode. After the vomiting of the first cases in 9 dormitories, the secondary cases occurred within incubation period in 7 dormitories(RR=15,95% CI:2.1-103). NorovirusⅠwas detected in 4 samples collected from 5 students. Vomiting and aerosol spread might be the risk factor for the outbreak in the dormitory. The school should strengthen the disinfection and isolate suspect cases in time.