天水市规模猪场猪伪狂犬病流行病学调查

Epidemiological Survey of Swine Pseudorabies in large-scale pig farms in Tianshui City of Gansu Province

为了解天水地区猪伪狂犬病在规模猪场的流行情况,并为该病的有效预防、控制和净化提供数据支撑。2022年2月—10月笔者所在项目组随机选取天水市7个县区的28个规模化猪场,对猪伪狂犬病免疫情况和发病情况等进行问卷调查,同时采集820份血清进行实验室检测。调查结果显示,天水市规模猪场(27/28)基本上都进行了猪伪狂犬病疫苗免疫,部分猪场猪伪狂犬病零星散发,窝产仔数为10~13头,断奶仔猪存活率约90%。实验室检测结果显示:28个规模猪场中11个猪场存在猪伪狂犬病毒野毒感染,猪伪狂犬病毒场感染率为39.29%,PRV-gB抗体合格率为68.57%。可见,天水市部分规模猪场仍存在猪伪狂犬病野毒感染,且存在免疫抗体合格率偏低的现象。

To understand the prevalence of porcine pseudorabies in large-scale pig farms in the Tianshui area,and provide data support for effective prevention,control,and purification of the disease.From February to October 2022,the author's project team randomly selected 28 large-scale pig farms in 7 counties and districts of Tianshui City to conduct a questionnaire survey on the immunization and incidence of pseudorabies in pigs.At the same time,820 serum samples were collected for laboratory testing.The results showed that the large-scale pig farms(27/28)in Tianshui City were basically immunized with porcine pseudorabies vaccine,and some pig farms were sporadically distributed.The litter size was 10~13,and the survival rate of weaned piglets was about 90%.The results of laboratory tests showed that 11 pig farms in 28 large-scale pig farms had wild-type infections of the porcine pseudorabies virus.The infection rate of porcine pseudorabies virus was 39.29%,and the qualified rate of PRV-gB antibody was 68.57%.It can be seen that there are still wild virus infections of porcine pseudorabies in some large-scale pig farms in Tianshui City,and the qualified rate of immune antibodies is low.