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| The latest research reveals: Why did H5N8 be introduced into my country but did not cause an outbreak of poultry avian influenza? |
The H5N8 subtype avian influenza virus (hereinafter referred to as "H5N8 virus") is extremely lethal to the poultry industry
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The latest research by the team of Academician Chen Hualan from the Harbin Veterinary Research Institute of the Chinese Academy of Agricultural Sciences found that although the H5N8 virus was introduced to wild birds in China through swans at the beginning of this year, it did not cause an outbreak of poultry avian influenza .
Academician of the Academy of Sciences
According to the International Food and Agriculture Organization, since 2020, the H5N8 subtype avian influenza virus has caused nearly 2,800 outbreaks of poultry and wild birds in more than 20 countries in Europe and Asia, resulting in the death or culling of more than 33 million poultry, including more than 1,100 in South Korea.
Ten thousand poultry and more than 9 million poultry in Japan have caused huge economic losses to the global poultry breeding industry
Academician of the Academy of Sciences
The research team collected and analyzed 41,172 poultry swab samples and 317 wild bird samples between September 2020 and June 2021, and isolated 36 H5N8 virus strains, of which 22 were from wild birds and 14 were from ducks and ducks.
Goose
These viruses are divided into two gene types.
The first type of virus was found to be circulated in Europe from January to June of 2020, South Korea and Japan from October to December, and introduced to China by swan in January 2021; The type virus was first detected in poultry in Iraq in May 2020.
It was endemic in Russia from June to September.
It was introduced to more European countries in October, and was introduced into China by swans, and then spread to 16 species of wild birds and some in China.
Ducks and geese of the region
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Studies have found that these viruses are highly lethal to chickens, mild to ducks, and virulence to mice varies from strain to strain
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More importantly, the researchers found that the conventionally immunized chickens and ducks in our country's poultry farms can completely resist the H5N8 virus attack, explaining why the H5N8 virus has not caused the outbreak of poultry avian influenza even though the H5N8 virus was introduced into wild birds in our country
Given that the widespread H5N8 virus in wild birds poses a continuing threat to poultry and public health, this study strongly urges high-risk countries to immunize poultry with H5 vaccine to effectively block the virus from entering poultry from wild birds and protect human life and health
Chinese Agricultural Sciences , Harbin Veterinary Research Institute, Cui Peng Fei, was significantly camp, Liyan Bing THE CHEMICAL Liaocheng University and first author of the article for Lixu Yong, China Agricultural Sciences , Harbin Veterinary Research Institute, Chen Hualan academician and researcher TANG Kwok-wah corresponding author for the paper
Academician of Cui Peng Academy of Sciences
