近期非洲猪瘟临床表现的新特点

New features of recent clinical manifestations of African swine fever

非洲猪瘟在经过多次传染、传代后,必然会出现变化,表现为潜伏期长、猪只带毒时间长、传播速度变慢、死亡率降低的慢性非洲猪瘟、温和性非洲猪瘟。同时非法疫苗的出现,使得非洲猪瘟临床早期发现难度增加,精准剔除操作困难,一旦发现时,往往全群已经大面积感染,损失惨重。为了更好指导生产,有必要对非洲猪瘟的临床新特点进行总结。

After many times of infection and generation by generation,African swine fever(ASF)is inevitable changing,which is manifested as chronic ASF with long incubation period,long time of virus-carrying,slow transmission speed,and reduced mortality rate,and mild ASF.At the same time,the emergence of illegal vaccines makes the early clinical detection of ASF more diffi cult,accurate culling operation diffi cult.By the time it is found,the whole group has been a large population of infection,causing heavy losses.In order to better guide production,it is necessary to summarize the new clinical characteristics of African swine fever.