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目的调查了解诺如病毒性胃肠炎暴发疫情的流行病学特点,为制订预防控制对策提供依据。方法设立病例定义,对暴发疫情发生地进行病例搜索,同时进行诺如病毒RNA检测,确定病原进行流行病学分析。结果暴发疫情共搜索到83例病例,临床症状/体征为胃胀、呕吐、腹痛、腹泻;发病人群为10岁以下及60岁以上人群,9～11岁组为高发人群;疫情发生在旅游景点并波及附近及养老院,病原为诺如病毒。结论诺如病毒性胃肠炎暴发疫情主要发生在秋季,多发生在人群聚集地区,食物污染及生活接触传播所致。及时采取综合性控制措施可避免疫情扩散。
Objective To investigate the epidemiological characteristics of Norovirus viral gastroenteritis outbreak and provide evidence for the development of prevention and control measures. Methods The case definition was set up to search out the case where the outbreak was occurring and carry out the Norovirus RNA detection to determine the pathogen for epidemiological analysis. Results A total of 83 cases were found in the outbreak. The clinical symptoms and signs were bloating, vomiting, abdominal pain and diarrhea. The incidence of the disease was below 10 years old and over 60 years old, while the 9 to 11 years old was the high incidence population. The epidemic occurred in the tourist attractions And spread to nearby and nursing homes, the pathogen is Norovirus. Conclusions The outbreak of Norovirus gastroenteritis mainly occurred in autumn and occurred in areas where people were concentrated. Food contamination and life contact were the main causes. Timely comprehensive control measures to prevent the spread of the epidemic.