1981年某厂先后发生两起食物中毒共79人。经调查,确认皆因食了被蜡样芽孢杆菌污染的剩大米饭所致。现将这两起中毒调查结果分析如下。一般情况:(1)两次食用米饭均为剩余饭,都是早先做好(第一次米饭存放23小时,第二次存放18小时);(2)存放米饭的环境温度高(24°～28℃);(3)食用的剩饭,食前只是略加温热后即食用。 A factory in 1981 occurred in two food poisoning a total of 79 people. After investigation, it is confirmed that all of them are due to eating the left over rice contaminated by Bacillus cereus. Now these two poisoning survey results are as follows. The general situation: (1) two meals of rice are leftovers, are done earlier (the first rice stored 23 hours, the second 18 hours); (2) the storage of rice in the high ambient temperature (24 ° ~ 28 ℃); (3) edible leftovers, just eat slightly warm before eating.