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１９９２年１０月至１９９９年２月间，某地区三个自然村多次发生在临床上以癫痫样抽搐，并且病死率极高的病例。为探求此类病例的发生因素，为减少、杜绝类似事件的发生，当地卫生行政和业务部门多次对病村进行了调查。１９９９年２月终于从１例同样发作死亡病例的肝、脑组织
Between October 1992 and February 1999, three villages in a certain area occurred on several occasions clinically with epileptic convulsions and had extremely high case fatality rate. In order to find out the causes of such cases, in order to reduce and prevent the occurrence of similar incidents, the local health administrative and business departments have conducted many surveys on the sick villages. February 1999 finally from the same case of death of liver and brain tissue