摘要
Abstract
In order to reveal the epidemiological characteristics of porcine reproductive and respiratory syndrome(PRRS)in Henan Province in recent years,80 865 porcine tissue samples collected from 4 211 farms/times from 2021 to 2024 were detected for PRRS pathogens,the data were then analyzed based on temporal,spatial and intergroup distribution according to different years,months,seasons,regions and types of sites.The results showed that the average positive rate of PRRS virus(PRRSV)at farm/population level was 3.23%,and that at individual level was 1.18%,both of which tended to increase year by year in the four-year period,and were higher in winter and spring,particularly in January and November,higher in eastern,western and northern Henan,compared to central and southern regions,and higher in rendering plants than those in farms and slaughterhouses,while no positive samples were detected on genetic farms or backyard farms.In conclusion,PRRSV was distributed with distinct temporal,spatial and intergroup characteristics in Henan Province,indicating a high incidence in winter and spring,especially in the areas along the Yellow River and the regions north of it,and posing a high contamination risk to rendering plants.Therefore,PRRS should be intensively controlled and purified in high-risk seasons and in prevalence areas according to the distribution characteristics and prevalence rules of the pathogen,while cleaning/disinfection measures and biosafety management should be improved in rendering plants and slaughterhouses to mitigate possible risk of pathogen transmission.关键词
猪繁殖与呼吸综合征/病原/监测/分析/河南省Key words
PRRS/pathogen/surveillance/analysis/Henan Province分类
畜牧业
