As Virulent Bird Flu Strain Spreads to Cows, Are People at Risk?
These cases of virulent bird flu in cows has put public health officials on the alert as fear it could mutate and spread to more people.
New H5N1 Bird Flu Virus Genotype Found In US Cows In Second Spillover Event
The USDA confirmed the detection in milk samples from Nevada.
Secondary strain of bird flu detected in cattle farms, raising concerns of human spread
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Highly pathogenic avian H5N1 influenza A virus replication in ex vivo cultures of bovine mammary gland and teat tissues - PubMed
Since early 2024, highly pathogenic avian influenza H5N1 viruses have been causing outbreaks in dairy cattle in the United States. Here, we compared the replicative capacity of A/dairy cattle/Texas/24-008749-001/2024 (H5N1; Cow-H5N1) isolated from a dairy cow, A/chicken/Ghana/AVL-76321VIR7050-39/202 …
Research out of Saskatchewan shows dairy cows build a natural immunity to bird flu after initial infection — The Community Press
When highly pathogenic avian influenza (HPAI) H5N1 was detected in U.S. dairy cattle in March 2024, it sparked a wave of research.
The Centers for Disease Control and Prevention says that 40 out of the 67 confirmed human bird flu cases since 2024 have been linked to exposure to dairy cows sick with the virus
The strain, called D1.1, was behind a human death from bird flu last year.
“If this turns out to have been something that crossed into cattle a couple months ago, a couple months is a long time not to detect it,
Experts say discovery raises questions about wider spread of virus and difficulty of controlling infections in animals
Now it looks like we have new strains of virus that may escape some of the immunity associated with the other strains of viruses that could exacerbate the epidemics among animals and wildlife
Genome sequencing of milk from Nevada has identified a different strain of bird flu in dairy cows for the first time, the USDA says
Dairy herds in Nevada test positive for newer bird flu strain that’s been linked to severe human infections | CNN
Farm workers in Washington state have also tested positive for D1.1 after culling infected poultry. Their symptoms were described as milder.
New Bird Flu Strain Detected In Cows In Nevada
No human bird flu cases have been linked to the consumption of raw milk. However, health officials still remain wary of raw milk consumption, citing a lack of data around whether humans can contract the bird flu from drinking it
H5N1 bird flu spills over again; Nevada cows hit with different, deadly strain
So far, the US has tallied 67 human cases of H5N1 since the start of 2024. Of those, 40 have been in dairy workers, while 23 were in poultry workers, one was the Louisiana case who had contact with wild and backyard birds, and three were cases that had no clear exposure.
USDA confirms spillover of 2nd H5N1 avian flu genotype into dairy cattle | CIDRAP
Cows Have Been Infected With a Second Form of Bird Flu - Behind Paywall
A new version of the virus is widespread in wild birds but had not previously been detected in cows.
Deadly version of H5N1 bird flu spills over into Nevada dairy cattle
Two very serious human infections linked to this strain.
USDA milk testing shows different strain of H5N1 bird flu in Nevada dairy herds
The U.S. Department of Agriculture announced Wednesday that four dairy herds in Nevada recently found to be infected with H5N1 bird flu were in fact infected with a different strain of the virus than has been circulating in cows for the past year.
US Department of Agriculture detects second bird flu strain in dairy cattle
The U.S. Department of Agriculture has detected a bird flu strain in dairy cattle that previously had not been seen in cows, the agency's Animal and Plant Health Inspection Service said on Wednesday.
USDA confirms HPAI outbreaks in Nevada dairy herds
Targeted starling removal a critical step
These influencers, RFK Jr. can't get enough of raw milk. But what about bird flu?
RFK Jr. supporters are hoping to see him legalize the consumption of raw milk. But with bird flu on the rise, experts warn it's not worth the risk.
Pasteurization destroys influenza viruses in milk, reinforcing dairy safety
Pasteurization at 63°C and 72°C effectively inactivates influenza A viruses in milk, ensuring its safety for human consumption while viral RNA may still be detected.
In laboratory inactivation of H5N1 in raw whole milk through milk acidification: results from a pilot study - PubMed
Avian Influenza virus H5N1 2.3.4.4.b has recently been detected in cattle, with milk from infected animals reported to contain a high viral load, serving as a potential source for shedding and dissemination of this virus. Currently, pasteurization is the only widely recognized method for on-farm ina …
No, we’re not ‘one mutation away’ from an H5N1 bird flu pandemic – here are the facts
In early December 2024, a group of researchers published an article in the journal Science, entitled “A single mutation in bovine influenza H5N1
Bird flu cases grow; threat greatest for those working with livestock or wildlife - NKyTribune
At the moment, avian flu poses the greatest threat to people working with livestock or wildlife. The disease has been found to have a devastating effect on poultry, but dairy cows have also had high infection rates.
Intraductal infection with H5N1 clade 2.3.4.4b influenza virus | Journal of Virology
In March 2024, highly pathogenic avian influenza (HPAI) H5N1 of the clade 2.3.4.4b was detected in dairy cows in Texas and has since been detected in several other U.S. states (1). Virus has been detected within cow’s milk, indicating that the mammary epithelium may support viral replication (2). Virus has also been detected on milking machines, leading to a hypothesis that influenza is spreading through fomites from udder to udder instead of the intranasal route (3, 4). There have been studies using cows to better understand mammary infections; however, the cow model is costly and limited (1, 5). We sought to establish a model for intramammary infections of H5N1 and H1N1 influenza virus in mice.
Pasteurisation temperatures effectively inactivate influenza A viruses in milk - PubMed
In late 2023 an H5N1 lineage of high pathogenicity avian influenza virus (HPAIV) began circulating in American dairy cattle Concerningly, high titres of virus were detected in cows' milk, raising the concern that milk could be a route of human infection. Cows' milk is typically pasteurised to render …
"Tempo Has Increased" As HPAI Spreads in The U.S.
Toothless guidelines, inadequate testing and long delays in releasing data -- echoes of the missteps during the Covid-19 pandemic -- have squandered opportunities for containing the outbreak.
Pasteurisation temperatures effectively inactivate influenza A viruses in milk
Nature Communications - In response to the emergence of H5N1 influenza A viruses as a novel pathogen of cattle, this study shows that pasteurisation of cows’ milk should effectively...
USask research shows Dairy cows build a natural immunity to H5N1 after initial infection
Dairy cows build a natural immunity to H5N1 after initial infection according to research conducted at the University of Saskatchewan (USask).When highly pa
Bird flu in cattle not an increased threat to humans - study - Agriland.ie
A study of bird flu viruses in cows has stated that the H5N1 strain does not pose an increased threat to humans.
Memo to RFK, Jr: Raw milk not worth the risk
Once upon a time, raw milk was reasonably safe to drink. But, that was long, long ago. An early scene in the movie “A League Of Their Own” (set in the 1940s) depicts two sisters sitting…
US dairy needs to stamp out H5N1 bird flu in 2025
Why the US dairy sector needs to act to stamp out H5N1 bird flu