mianyangfeixianliubingshiyoufeixianliubingduyinqidemianyangdeyizhongmanxingzhongliuxingjibing。gezhongnianlinghepinzhongdemianyangjunnengganran
，danpinzhongjiandeyiganxingyousuoqubie，yimeilinumianyangdeyiganxingzuigao。bingyangshizhuyaochuanranyuan，zhuyaojinghuxidaochuanran
，bingyangkesoushipaichudefeimoheshenduqichuanshipaichudeqiwuzhong
，hanyoudaibingdudexibaohuoxibaosuixie，jiankangyangxiruhoujibeiganran。gaibingzhuyaochengdifangxingliuxinghuosanfaxingchuanbo
，fabinglvwei２％～５％
，死亡率可達１００％。

    症狀  潛伏期１～３年nian，病bing羊yang常chang突tu然ran出chu現xian呼hu吸xi困kun難nan，病bing初chu一yi般ban體ti溫wen正zheng常chang
，經jing常chang咳ke嗽sou，呼hu吸xi淺qian表biao，進jin一yi步bu呼hu吸xi困kun難nan
，水shui樣yang鼻bi漏lou
，運yun動dong後hou呼hu吸xi困kun難nan加jia劇ju
，抬tai高gao後hou肢zhi或huo壓ya低di頭tou部bu時shi鼻bi漏lou增zeng多duo。聽ting診zhen肺fei部bu有you濕shi羅luo音yin。發fa病bing後hou期qi，病bing羊yang衰shuai竭jie


、消瘦、貧血，但仍站立。可繼發化膿菌感染，引起化膿性肺炎。症狀出現後常可持續２～８個月，最終病羊虛脫致死。

    防治  muqianshangwuyimiaoheyouxiaodezhiliaofangfa。yinci
，fangzhibenbingdeguanjianzaiyufangzhijiankangyangjiechubingyang
，fashengbenbinghou

，jiangsuoyoubingyangyilvtaotai。jiaqiangjinkoujianyi
，yinjinzhongyangyinglaizifeiyiqu，xinjindeyangbixugeliguancha，jingjianyirenweijiankangshifangkehunqun。