摘要
为全面了解2017-2021 年云南省猪瘟(CSF)流行及免疫状况,预估疫病流行和发生风险,采集病原学样品 63 224 份、血清学样品 146 547 份,进行CSF病原和血清抗体监测.结果显示:2017-2021 年云南省CSF免疫抗体合格率分别为 82.94%、81.47%、80.79%、80.24%、82.53%,规模场合格率略高于散养户,但差异不显著(P＞0.05);CSF病原核酸阳性率分别为 0.52%、0.74%、1.10%、1.02%、2.42%,散养户、屠宰场阳性率高于规模场.结果表明:自2017年CSF退出强制免疫后,云南省CSF免疫抗体合格率均达到国家标准,但病原阳性率整体呈上升趋势,且分布范围广,免疫密度低和抗体合格率低的散养户发生CSF的风险较高,提示应对其加强监测和免疫.
Abstract
In order to fully investigate the status of infection and immunization of classical swine fever(CSF)in Yunnan Province from 2017 to 2021,and to estimate the possible risk of disease outbreak and spreading,63 224 etiological samples and 146 547 serological samples were collected,and a monitoring of CSF pathogens and serum antibodies was carried out.The results showed that qualification rates of CSF immune antibodies were 82.94%,81.47%,80.79%,80.24%and 82.53%,respectively in the successive five years,the rates in intensive farms were slightly higher than those in free-range households,but the difference was not significant(P＞0.05);the positive rates of CSF virus nucleic acids were 0.52%,0.74%,1.10%,1.02%and 2.42%,respectively,the rates in free-range households and slaughterhouses were higher than those in intensive farms.In conclusion,the qualification rate of CSF immune antibodies reached national standards in Yunnan Province since compulsory immunization was withdrawn in 2017,but the pathogenic positive rate was increasing in general,and CSF virus was widely distributed,the risk of CSF occurrence was higher in free-range households with low immune density and qualification rate,indicating a need to strengthen monitoring and immunization.
基金项目
云南省重大科技专项(202102AE090039)
维普
万方数据