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", Liu Guanguan/China News Service via Getty Images, Centers for Disease Control and Prevention, Zoos across North America are moving birds indoors to protect them from avian flu, Bird flu outbreak drives Nebraska to cull 1.8 million more chickens, Bald eagles around the U.S. are contracting the bird flu. "This is a novel virus for North American birds, so no one knows if their immune systems will adapt, or how long that will take, or what that will look like. H5N1 is a specific type of influenza virus, predominantly harbored by birds, that was first detected on a goose farm in China in 1996. https://www.pbs.org/newshour/nation/what-consumers-need-to-know-about-the-avian-flu-outbreak, As avian flu spreads, North American zoos take precautions to protect birds, Americans may soon pay more for milk, cheese as rising heat stresses livestock, For Midwest farmers, floodwaters threaten millions in crop and livestock losses, outbreak of highly pathogenic avian influenza, depression, coughing and sneezing and sudden death, the risk to public health from this outbreak is low, last H5N1 outbreak in the U.S. in 2014 and 2015, travel thousands of miles between continents, eradicate HPAI quickly after it is detected. Previous outbreaks of avian influenza -- whether low pathogenic virus that is endemic in the U.S. or highly pathogenic H5N8 in 2015 -- typically occurred in the fall, which meant farmers could . Scientists are monitoring avian flu and other pathogens in animals more closely than. Illness in humans from all bird flu virus infections has ranged in severity from no symptoms or mild illness to severe disease that resulted in death. The H5N1 avian influenza virus is causing the largest bird flu outbreak in history, infecting millions of birds and a growing range of mammal species. Heres the key question: If H5N1 can achieve spread in minks and possibly sea lions, why not humans? Bird flu has led to the death and slaughter of 316 million poultry worldwide . However, since then, infections in both humans and birds have been observed. Hagerman warns that in a time of inflationary pressure and supply-chain snags, it can be hard to directly link a price hike to the virus. University of Colorado Boulder virologists Sara Sawyer, Emma Worden-Sapper and Sharon Wu summarize the compelling story of H5N1 and why scientists are closely watching the outbreak. The primary natural hosts and reservoir of AI viruses are wild waterfowl, such as ducks and geese. A virus is single-minded: It has to replicate, to reproduce, He said. April 24, 2023. Nothing like this has happened in the past and the question is what has changed?. Avian influenza A (H7N9) virus outbreak - WHO Monthly case counts are available on the. All Rights Reserved. If you need to go back and make any changes, you can always do so by going to our Privacy Policy page. Avian influenza viruses change slowly over time, but the right mutation could make them more transmissible in people and other species, says Ian Barr, deputy director of the World Health . Avian flu is ravaging farmers and the markets. At this time, the Department of Agriculture has not approved the use of vaccination in the U.S. for protecting birds from avian influenza. Remember that the seasonal flu vaccine must be remade every year, even though the general types of flu viruses that it protects against are the same, because the specific genetic variants that affect humans change from year to year. Government officials are studying infections atturkey farms, in particular, in hopes of developing new recommendations for preventing infections. Birds often die after becoming infected. For more details, review our .chakra .wef-12jlgmc{-webkit-transition:all 0.15s ease-out;transition:all 0.15s ease-out;cursor:pointer;-webkit-text-decoration:none;text-decoration:none;outline:none;color:inherit;font-weight:700;}.chakra .wef-12jlgmc:hover,.chakra .wef-12jlgmc[data-hover]{-webkit-text-decoration:underline;text-decoration:underline;}.chakra .wef-12jlgmc:focus,.chakra .wef-12jlgmc[data-focus]{box-shadow:0 0 0 3px rgba(168,203,251,0.5);}privacy policy. This version of the influenza virus doesn't affect "broilers" chickens raised for meat as badly it does "layers" table-egg laying hens and turkeys. However, outbreaks in domestic commercial and backyard poultry flocks, in addition to infections in wild birds and some mammals, might place some groups of people, who may have job-related or recreational exposures to birds, at higher risk of infection. Avian Influenza. There are ongoing outbreaks of HPAI in wild birds in Asia, Europe and Africa. Vaccination also could delay outbreak detection, since it can potentially hide non-apparent infections in infected birds. "Generally you need two doses of a vaccine and then a length of time to achieve full effectiveness.". Recently it has begun infecting an exploding diversity of bird and mammalian species around the globe. In the U.S. the virus has led to the destruction of millions of commercially raised chickens, turkeys, ducks, and geese, and has killed thousands of wild birds. The third and most worrisome reason that this virus is getting so much press is that H5N1 now seems to be transmitting well between individuals of at least one mammalian species. Among these, H5N1 and H7N9 viruses have caused the majority of infections in people. Although declaring a disease endemic is a complicated process, the authors of the study suggest that the U.S. will likely follow patterns seen in Europe where highly pathogenic avian influenza is already being treated as an endemic disease rather than something that can be eradicated. Scientists Investigate a Bird Flu Outbreak in Seals As those birds traveled, so did the virus. Johanna A Harvey, Jennifer M. Mullinax, Michael C. Runge, Diann J. Prosser. Low pathogenic disease is less contagious and easier to contain than the highly pathogenic variety. But this new virus appears sustained throughout the year, with summertime disease detections in wild birds and poultry outbreaks occurring in both the spring and fall. The same strain had caused a wave of bird flu outbreaks across Europe and Asia. Experts found the H5N1 Eurasian strain, a highly pathogenic avian influenza virus type. Losses of poultry flocks sent prices foreggsand turkey meat to record highs, worsening economic pain for consumers facing red-hot inflation and making Thursdays Thanksgiving celebrations more expensive in the United States. With avian influenza viruses, it is not possible to make effective human vaccines in advance, because we dont know exactly what the genetics of the virus will be if it starts to spread well in humans. There are two groups of AI viruses that cause disease in chickens: highly pathogenic AI and low pathogenic AI. But scientists didn't know until the recent outbreak how infected condors would fare. An outbreak of avian influenza in seabirds in the Gambia could affect vast numbers of birds migrating along the East Atlantic Flyway, unless international funding is secured, warn conservationists. AI viruses are classified by a combination of two groups of proteins: hemagglutinin or "H" proteins, of which there . None of the farm workers became infected. Importers would not be able to distinguish vaccinated birds from infected birds based on the routine testing, so they might ban all U.S. poultry exports. CDC has been comparing the properties of current H5N1 bird flu viruses to past H5N1 bird flu viruses and has found that current H5N1 bird flu viruses detected in the U.S. during late 2021 and 2022 are different from earlier H5N1 bird flu viruses. Peru decreed a 90-day health emergency in December 2022 after more than 13,000 pelicans died on its beaches, possibly infected with H5N1. "Generally speaking, these complexes are over a million birds, easily," Hagerman says. The COVID con is over, monkeypox is a non-event, so lets resurrect bird flu as the new threat to mankind and a chance for Big Pharma to create a new raft of bloated billionaires.You must think Jo Public is even dumber than the brains behind these pathetic endless scare stories. "Just a lot . Ultimately, the USDAs goal is to eradicate HPAI quickly after it is detected. Read the original article. By University of Colorado Boulder The Powers Farm white turkey flock is seen under shelter as part of an effort to prevent exposure to avian influenza on Nov. 14, 2022 in Townsend, Del. A truck drives out the entrance of the Cold Springs Eggs Farm where the presence of avian influenza was reported to be discovered, forcing the commercial egg producer to destroy nearly 3 million chickens on March 24, 2022 near Palmyra, Wisconsin. April 14, 2023. You will be subject to the destination website's privacy policy when you follow the link. The virus does not pose a special risk in the nation's food supply, given proper handling. "The chicken that most people think of, their chicken tenders, their chicken sandwiches, all of those things haven't tended to have the same kinds of impact," she adds. "The bird populations haven't seen viruses like this before," Webby says, "so in terms of their immune response, they're all immunologically nave to this" influenza virus. More than 60% of U.S. broiler . March 6, 2023. But lab tests soon revealed something scarier: a deadly avian influenza virus named H5N1. Klebher Vasquez/Anadolu Agency via Getty Images, NOW WATCH: Why raccoons are so hard to get rid of, according to the World Health Organization, data from the Centers for Disease Control and Prevention, Insider's George Glover explained the egg crisis facing Americans as prices surged by almost 60% in 2022 due to the influenza outbreak. Highly pathogenic avian influenza (HPAI)a disease infecting birds and poultrystruck egg-laying hens throughout 2022. *Highly pathogenic avian influenza (HPAI) and Low pathogenic avian influenza (LPAI) are described in the Classification of bird flu viruses section. 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Avian influenza A (H7N9) is a subtype of influenza viruses that have been detected in birds in the past. www.sciencedaily.com/releases/2023/04/230419125054.htm (accessed April 30, 2023). "This outbreak in the wild bird population is a lot more extensive than we saw in 2014 and 2015," says David Stallknecht, an avian influenza researcher with the University of Georgia. Bird Flu is Killing Off the World's Birds - New York Times ", The long outbreak is discouraging, Hagerman says: "If we look at Europe, we can see that they are on two years of HPAI outbreaks. ScienceDaily, 19 April 2023. Sign up for notifications from Insider! An outbreak of highly pathogenic avian influenza (HPAI) in chicken and turkey flocks has spread across 24 U.S. states since it was first detected in Indiana on Feb. 8, 2022. The good news about H5N1 for humans is that it currently doesnt spread well between people. But when you actually go on the inside and take a look, the viruses we have here are quite different now from what was in Europe.". A sample of avian influenza isolated from a Chilean man who fell ill last month contains two genetic mutations that are signs of adaptation to mammals, officials from the Centers . Nathan Howard/Getty Images A Gull Flaps Its Wings and a Deadly Virus Explodes Introduction of the Eurasian lineage HPAI to North . Human infections with bird flu viruses have most often occurred after close or lengthy unprotected contact (i.e., not wearing gloves or respiratory protection or eye protection) with infected birds or places that sick birds or their saliva, mucous and feces have touched. People should avoid unprotected contact birds that look sick or have died, though the outbreak poses a low risk to the general public, the U.S. Centers for Disease Control and Prevention said. Scientists continue to monitor the ongoing global avian influenza outbreak also referred to as bird flu that has killed millions of birds and has now crossed over to some species of mammals. The outbreak is "wiping out everything in numbers we've never seen before," Jennifer Mullinax, an assistant professor of environmental science and technology at the University of Maryland, told Sky News. More reports poured in over the following weeks and months, raising alarms as the virus spread to more states. Learn more about past human infections with bird flu viruses. The researchers hope their work will bring key players to the table to consider the next steps. Learn more about Friends of the NewsHour. Thats when production of eggs is hammered.. The team's conclusions are based on an analysis of five different data sources that provide information on the incidence of highly pathogenic avian influenza in wild birds and poultry focusing on the USA and Canada as well as a global database from 2014 through early 2023. Once that happens, entire flocks typically need to be culled. The disease can and does affect humans, but it's rare. Bird flu is killing millions of birds in US, driving up egg prices
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