中国动物检疫2023，Vol.40Issue(11)：21-24,4.DOI:10.3969/j.issn.1005-944X.2023.11.005
2022年湖南省家禽H7N9亚型禽流感监测与分析
Monitoring and Analysis of H7N9 Subtype Avian Influenza Prevalent in Poultry in Hunan Province in 2022
摘要
Abstract
In order to investigate the level of immune antibodies against H7N9 subtype avian influenza virus(AIV)as well as prevalence status of the virus in poultry(chickens,ducks and geese)in Hunan Province,46 112 poultry serum samples and 53 246 swabs were collected by quota sampling from avian breeding farms,commercial farms,free-range households and live poultry markets in 14 cities/prefectures across the province,for detection of immune antibodies and nucleic acids of H7N9 subtype AIV respectively by HI test and fluorescent RT-PCR assay.The results showed that the average qualification rate of immune antibodies at farm/population level was 93.27%,and that at the individual level was 90.60%,and positive viral nucleic acids were detected only from one chicken swab sample from a live poultry market.Both the average qualification rates of immune antibodies at farm/population(94.66%)and individual(91.51%)levels were higher in chicken as compared with those in waterfowl(83.26%and 81.86%);and the two rates were the highest in breeding farms and lowest in live poultry markets,the difference between them was statistically significant(P＜0.05);and all the rates were above 70%in 14 cities/prefectures across the province.In conclusion,the immune effect of H7N9 subtype avian influenza was good in poultry in Hunan Province in 2022,and no pathogens were detected in any poultry population on farms,with lower risk of virus large-scale outbreak,except one live poultry market where pathogens were available,and waterfowl,poultry populations in free-range households and live poultry markets where the immune antibody level was slightly lower,with the risk of disease spread.It was thus recommended to further strengthen the monitoring of immune antibodies against H7N9 subtype AIV as well as animal quarantine supervision,and constantly to improve the level of public health safety protection.关键词
H7N9亚型禽流感/家禽/监测/湖南省Key words
H7N9 subtype avian influenza/poultry/monitor/Hunan Province分类
农业科技引用本文复制引用
黄建龙,郭永祥,张朝阳,范仲鑫,鲁杏华..2022年湖南省家禽H7N9亚型禽流感监测与分析[J].中国动物检疫,2023,40(11):21-24,4.基金项目
湖南省动物疫病监测流调专项(湘财农指[2022]19号) （湘财农指[2022]19号）
