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1993年4月1日白城市第一幼儿园57名5～7岁儿童进食“二米饭”(小米和大米)1～6h后,相继出现恶心、呕吐、腹痛、腹泻等症状,罹患率为100%;而未食者未发病。对幼儿食用剩下的“二米饭”、呕吐物、排泄
On April 1, 1993, 57 children aged 5 to 7 years old, aged from 1 to 6 hours after eating “two rice” (millet and rice), developed symptoms of nausea, vomiting, abdominal pain and diarrhea one after the other. The attack rate was 100% ; While not eaten yet. The remaining children eat “two rice”, vomit, excretion