During a commercial duck operation, a new bird flu-H5N9 was found in Merseridian County, California.

According to the World Animal Health Organization, the organization is a alliance of medical, veterinarians, and wild animals and plants to study and report animal diseases-testing ducks on the farm shows that these animals have been infected by H5N1 and H5N9 strains.

"The case is not surprising or shocking.

The new strain is a combination of H5N1 strains widely detected around the world. It may be a kind of mild virus that "low-pathological" bird flu virus-a mild virus, not killing birds, but not killing them. Move. The biologist of the Pittsburgh virus and vaccine research company Recombinomics Inc..

He said: "This is just a new serum type, N1 segment is replaced by N9."

Influenza virus consists of eight fragments, including the hemagenin protein of the virus, or the "H" section, and the neuropine enzyme or "N" part. When animals are infected by two different influenza viruses, the genetic materials of the two can be switched or re-combined to form a new version-this may be what happened here: although hemagglutinylin-allows some of the virus to be attached to The new neuropine enzymes remain unchanged), which helps to release the virus from the infected cells.

Fortunately, Richard Webby, the World Health Organization, said the combination of such commercial ducks is unlikely to increase the possibility of human popularity. Webby, the director of the whow animal and bird influenza ecological research center, said that the virus's threat to human health is not greater than the H5N1 strains circulating in cows, commercial poultry and wild animals.

However, it may be a question whether H5N1 and human seasonal influenza will be performed.

Such a combination may provide the required equipment for bird flu, so that it is easier and effectively passed between people.

"We can be sure of the re -cultivation of this virus. Naturally, it is a huge functional reward experiment.

So far, there is no evidence that there has been this ability to circulate bird flu virus strains in North America.

According to data from the Center for Disease Control and Prevention, 67 people in the United States have infected H5N1 bird flu. One person died. Most cases have been connected to career exposure through infected cows or poultry. In three cases, the source is still unknown.

Niman said that there are four types of bird flu viruses in the H5 family in North America. The two are part of the H5N1 strain. One of them is H5N1 B3.13, which is mainly found in dairy and dairy workers. Other H5N1, known as D1.1, has largely affected wild birds and commercial poultry. This is also the version of the virus. He killed a person in Louisiana, and seriously caused a teenager in British Columbia.

Then there is H5N2 circulating in British Columbia. It is also a re -classification of H5N1 virus and another bird flu virus. It was first discovered in November 2024 and was discovered in at least two commercial poultry business.

Now, according to the US Department of Agriculture's testing and genetic sequencing, H5N9 has now been found. So far, H5N9 has been discovered in Mercede County.

The Ministry of Agriculture in the United States said in a report to the World Animal Health Organization: "This is the first confirmation case of HPAI (high pathogenic bird influenza) H5N9 HPAI (high pathogenic bird influenza)." Aphis (APHIS) conducted comprehensive epidemiological research with national animal health and wild animals and plant officials, and enhanced the surveillance of HPAI -related events. "

The virus was discovered on the duck farm in late November. Before December 2nd, all ducks (about 119,000 birds) were euthanized.

Weber said he believed that the virus was erased in the poultry surgery-there was no report in other commercial operations or wild birds.

So far, no one has been reported by H5N9 infection.

"The overall situation: There are many bird influenza viruses circulating, so this is not surprising," said the associate professor Maurice Pitesky. And food safety epidemiology. In other words, researchers need a more powerful surveillance system that provides information about "where is the water bird, and we suspect that the HPAI information that HPAI exists in commercial facilities."

State veterinarian Jones said that the Ministry of Agriculture and the US Department of Agriculture "will continue to monitor new or unusual viruses as part of our test strategy."