防治控制动物疫病，促进畜牧业发展。 动物疫病防疫 动物疫病疫情受理 动物疫病诊断、监测与检验 动物疫病预防控制系统建设与指导 相关业务培训、技术指导与宣传
Plant polyphenols are a type of secondary metabolite widely present in plants,possessing various physicochemical properties and biological functions.Its physicochemical properties include antioxidant capacity and chelating ability for metal ions and so on.In terms of biological functions,plant polyphenols possess multiple effects such as antioxidation,anti-inflammation,antibacterial,and immune regulation.They can also improve animal intestinal health by enhancing intestinal barrier function,regulating intestinal microbiota composition.In pig production,plant polyphenols can enhance the production performance of pigs,improve gastrointestinal function,inhibit lipid peroxidation reactions,and thereby improve meat quality.In addition,plant polyphenols can also alleviate heat stress in pigs,improve the antioxidant and immune functions of sows,and promote embryonic growth.The article summarizes the physicochemical properties,biological functions,and applications of plant polyphenols in pig production,in order to provide reference for green and healthy pig farming.
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.
