中国兽医杂志2025，Vol.61Issue(5)：33-42,10.DOI:10.20157/j.cnki.zgsyzz.2025.05.004
2022-2024年西南地区部分规模化猪场健康猪群4种重要疫病的病原学调查与分析
Pathogen Survey and Analysis of Four Major Diseases in Healthy Pig Populations from Some Large-Scale Pig Farms in Southwest China from 2020 to 2024
摘要
Abstract
In animal disease prevention and control,regular pathogen testing provides clear early warning signals for large-scale pig farms before outbreaks or during the early stages of disease onset.This study focuses on pathogen surveillance of porcine reproductive and respiratory syndrome virus(PRRSV),pseudorabies virus(PRV),classical swine fever virus(CSFV),and hepatitis E virus(HEV)in healthy pig populations from large-scale pig farms in Chongqing,Sichuan,and Guizhou in Southwest China.From March to May of 2022,2023,and 2024,5 349 whole blood samples and 4 275 nasal swab samples were collected from 47 large-scale pig farms across 10 districts and counties in Southwest China.Polymerase chain reaction(PCR)was performed to detect PRRSV,PRV,CSFV,and HEV in all samples.The results showed that PRRSV,PRV,and CSFV have been effectively controlled in Southwest China.The positive rate of classic PRRSV(C-PRRSV)in clinically healthy pigs was 0.22%(4/1 811)in 2022,0.27%(5/1 831)in 2023,and 0(0/1 707)in 2024.The positive rate for highly pathogenic PRRSV(HP-PRRSV)was 0.28%(5/1 811)in 2022,0.16%(3/1 831)in 2023,and 0.18%(3/1 707)in 2024.The positive rate for PRV was 0.07%(1/1 505)in 2022,0.19%(3/1 541)in 2023,and 0(0/1 229)in 2024.The positive rate for CSFV was 0.28%(5/1 811)in 2022,0(0/1 831)in 2023,and 0(0/1 707)in 2024.However,the positive rate for HEV showed an upward trend,increasing from 0.11%(2/1 811)in 2022,to 0.44%(8/1 831)in 2023,and 1.23%(21/1 707)in 2024.The results indicate that large-scale pig farms in Southwest China have effectively prevented and eradicated PRRSV,PRV,and CSFV.However,sporadic detection of these viruses is still possible in areas with high pig mobility.Meanwhile,the rapid increase in HEV positive rates should raise high concern among farm managers,and further strengthening of HEV monitoring and control is needed.关键词
猪繁殖与呼吸综合征病毒(PRRSV)/伪狂犬病病毒(PRV)/猪瘟病毒(CSFV)/戊型肝炎病毒(HEV)/病原学调查Key words
porcine reproductive and respiratory syndrome virus(PRRSV)/pseudorabies virus(PRV)/classical swine fever virus(CSFV)/hepatitis E virus(HEV)/pathogen survey分类
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赵婵娟,鄢行安,曹立亭..2022-2024年西南地区部分规模化猪场健康猪群4种重要疫病的病原学调查与分析[J].中国兽医杂志,2025,61(5):33-42,10.基金项目
重庆市科技局自然科学基金面上项目(CSTB2022NSCQ-MSX1436) （CSTB2022NSCQ-MSX1436）
重庆三峡职业学院校级科研团队(xzy-2023td-005) （xzy-2023td-005）
