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目的对天津市东丽区2017年发生的两起由诺如病毒引起的群体性呕吐腹泻事件开展调查,为今后处理类似事件提供参考。方法开展现场流行病学调查,采集部分病例便样、呕吐物和可疑食物及厨房样本进行诺如病毒和致病菌检测。结果两起疫情分别发生在学校和幼儿园,分别报告病例12例和8例,罹患率为0.42%和21.60%,病例发病时间均集中在24h内。症状以呕吐和腹痛为主,两起事件病例便样检出诺如病毒G1+G2双阳性1份,G2阳性3份,其他标本均为阴性。结论这两起集体呕吐腹泻事件均是由诺如病毒引起,学校和幼儿园为防控的重点场所,防控重点为区别排除食物中毒,及时规范采样,有效避免人传人的情况发生。
Objective To investigate two groups of nausea and vomiting diarrhea caused by Norovirus in Dongli District of Tianjin in 2017 and provide reference for the handling of similar events in the future. Methods To carry out on-site epidemiological investigation, collecting some cases of samples, vomitus and suspicious foods and kitchen samples for Norovirus and pathogen detection. Results The two outbreaks occurred in schools and kindergartens respectively, 12 cases and 8 cases were reported, the attack rate was 0.42% and 21.60%, respectively. The onset time of cases were all within 24h. Symptoms of vomiting and abdominal pain, two cases of incidental samples were detected norovirus V2 double positive 1, G2 positive 3, the other specimens were negative. Conclusions Both of these episodes of vomiting and diarrhea were caused by Norovirus. Schools and kindergartens were the key places for prevention and control. Prevention and control focused on eliminating food poisoning and timely sampling, effectively avoiding human-to-human transmission.