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20 0 2年 12月 2 0日 ,湖北省潜江市市域范围内某中学学生晚餐后 ,不同程度的出现食物中毒症状 ,经流行病学调查、临床及实验室诊断 ,证实为一起蜡样芽胞杆菌污染引起的食物中毒。现将调查结果报告如下。12月 2 0日晚 17时 3 0分至 18时 ,某中学学生 3 17人在该校食堂进晚餐。?
On December 20, 2002, some secondary school students in the urban area of Qianjiang City, Hubei Province, showed symptoms of food poisoning to varying degrees. After epidemiological investigation, clinical and laboratory diagnosis, they were confirmed to be waxy buds Bacterial contamination caused by food poisoning. The survey results are reported below. On the night of 20 December, from 1730 to 1800 hours, a total of 317 students from a secondary school attended a dinner in the school cafeteria. ?