2022年我国部分省份猪瘟猪繁殖与呼吸综合征和猪伪狂犬病流行病学调查

Epidemiological Investigation on CSF,PRRS and PR in Part of China in 2022

为了解我国不同地区不同生长阶段及不同规模猪场猪群的猪瘟CSF猪繁殖与呼吸综合征(PRRS)和猪伪狂犬病(PR)流行情况,对2022年收集的6172份血清样品和2301份病原检测样品分别进行猪瘟病毒(CSFV)、猪繁殖与呼吸综合征病毒(PRRSV)及伪狂犬病病毒(PRV)抗体及抗原检测。结果显示:CSFV、PRRSV、PRV-g E抗体阳性率分别为94.15%、63.06%和8.55%,病原检出率分别为0.13%、8.50%和0.80%。育肥场的PRRSV抗原检出率最高,且S/P≥2.5占比最高;5~6胎母猪的PRV-g E抗体阳性率(60.87%)显著高于其他生长阶段猪群(P<0.05)。结果表明:CSF整体免疫防控效果良好,疫情发生风险较低;PRRSV免疫抗体阳性率不高,特别要警惕育肥场13~21周龄育肥猪的PRRSV感染;高胎龄母猪的PRV带毒情况严重,建议做好后备猪的更新与高胎次母猪的淘汰工作,并大力推进PR净化。

In order to investigate the prevalence of classical swine feverCSFporcine reproductive and respiratory syndrome(PRRS)and porcine pseudorabies(PR)in pig population at different ages in farms with different scales in different regions in China,6172 serum samples and 2301 pathogen samples collected in 2022 were detected for antibodies and antigens of classical swine fever virus(CSFV),porcine reproductive and respiratory syndrome virus(PRRSV)and pseudorabies virus(PRV),respectively.The results showed that the antibody positive rates of CSFV,PRRSV and PRV-g E were 94.15%,63.06%and 8.55%,respectively,and the pathogen detection rates were 0.13%,8.50%and 0.80%,respectively.The detection rate of PRRSV was the highest in fattening farms,and S/P≥2.5 took up the highest proportion;the antibody positive rate of PRV-g E(60.87%)was significantly higher in sows with 5-6 births than that in other pig population at different growth stages(P<0.05).In conclusion,CSF was well controlled by immunization in general,posing a low risk of disease outbreak;the immune antibody positive rate of PRRSV was low,which brought an alert to PRRSV infection in fattening pigs at 13-21 weeks old;and PRV was seriously carried by the sows at high gestational age,replacement of gilts and elimination of sows with excessive births were recommended to push forward the eradication of PR.