Analysis on Elimination Effect of Avian Leukemia on Key Breeding Chicken Farms from 2013 to 2020 in Guangxi
According to the principle of multiple detectionelimination-clustering,a"biosafety+pathogen monitoring+elimination"model was developed for avian leukemia on key breeding farms.Semen,egg white,cloacal swab,meconium and other samples were collected from 2013 to 2020 from breeding roosters,breeding hens,bred chickens and chicks on 11 key breeding farms in Guangxi and tested for avian leukemia.Plasma proteins were collected from cocks and hens for avian leukemia virus(ALV)isolation.The positive rate of ALV gradually decreased every year and the elimination effect of avian leukemia was very significant.In detail,the positive rates of ALV in cock semen decreased from 7.45％in 2013 to 0.14％in 2020,in hen egg white samples from 12.32％in 2013 to 0.23％in 2020 and in chicken meconium from 3.60％in 2018 to 0.47％in 2020.The detection rates of ALV in plasma protein of cocks decreased from 3.46％in 2013 to 0.78％in 2020 and plasma protein of hens from 2.22％in 2013 to 0.20％in 2020.It was indicated that the established purification method of avian leukemia was effective in Guangxi.
国家科技期刊平台
NSTL
万方数据
