1病例报告林某某，男性，19岁，英籍华人，因四肢乏力、不自主抽动，记忆力减退1年，言语不清半年余于1997年11月19日入院。既往无特殊病史，无器官移植及注射生物制品史。自幼在英国长大，喜饮牛奶，常食牛肉，家族中无类似病史。患者于1996年9月渐感右上肢乏力、疼痛及不自主 1 case report Lin Moumou, male, 19 years old, English Chinese, due to weakness in limbs, involuntary twitching, memory loss for 1 year, ill-fated more than six months was admitted on November 19, 1997. No previous history of special medical history, organ transplantation and biological history of injection. Since childhood grew up in the UK, drink milk, eat beef, no similar family history. In September 1996, the patient gradually became sensitized to the right upper extremity, pain and involuntary