World distribution of scrapie and control measures in various countries .
痒病的分布及各国采取的防控措施。
The national scrapie plan administrative centre nspac .
和国家羊搔痒症计画管理中心。
Thought to have started from feeding brain tissue from sheep having died of scrapie .
认为由饲喂死于痒病的绵羊脑组织引起。
Scrapie affects the central nervous system and causes severe itching or drowsiness .
痒病侵袭中枢神经系统，引起严重的瘙痒或昏睡。
There have never been scrapie , bovine spongiform encephalopathy , african horse sickness , african swine fever , vesicular stomatitis , lumpy skin disease , rift valley fever and peste-des-petits ruminants in china .
