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目的分析蓬莱某全日制封闭管理学校,在校学生、教工出现腹痛、腹泻、恶心、呕吐等症状的发病原因。方法采用描述流行病学和分析流行病学方法对蓬莱某中学的疫情资料进行统计分析。结果蓬莱市某中学在校教工和学生共计1856人。有468名教职工和学生出现腹痛、腹泻、恶心、呕吐等症状,其表现酷似食物中毒和诺瓦克感染性腹泻,经监测和流调发现在疾病的三间分布上除在时间分布上有一定的聚集性,在发病人群和班级分布均无显著性。实验室检测在水源水中查出粪大肠和侵袭性大肠O135型,属于典型的点源性暴发疾病。结论蓬莱市某中学发生的本次事件是由该校自备水源受到温血动物粪便污染而导致的一起由侵袭性大肠O135型感染而引起的点源性暴发疾病。
Objective To analyze a full-time closed-management school in Penglai. The causes of abdominal pain, diarrhea, nausea and vomiting among students and faculty members were analyzed. Methods Epidemiological and analytical epidemiological methods were used to analyze the epidemiological data of a middle school in Penglai. Results A total of 1856 faculty members and students in a high school in Penglai City. 468 faculty members and students experienced symptoms of abdominal pain, diarrhea, nausea and vomiting. The performance was similar to that of food poisoning and Norwalk-infected diarrhea. Monitoring and flow-through found that there were three distributions of the disease except for time distribution A certain degree of aggregation in the incidence of the crowd and class distribution were not significant. Laboratory tests found fecal colon and invasive large intestine O135 type in the source water, is a typical point-source outbreaks. Conclusion This incident in a middle school in Penglai City was caused by a source-triggered outbreak of an infectious large-intestine-O135 infection caused by its own source of water contaminated by excrement from warm-blooded animals.