Dairy cattle hpai tech brief
H5N1 Cows
Second Strain of Bird Flu Found in US Dairy Cows: What It Means for Infection Prevention and Control
A new H5N1 strain was found in Nevada dairy cows, challenging earlier transmission theories. This raises concerns about animal vulnerability, human health risks, and food safety. Experts emphasize the need for improved surveillance, biosecurity, and cross-sector collaboration to contain the virus spread.
All the Latest Unnerving Bird-Flu Developments
A new H5N1 strain has been spotted in cows and New York is temporarily closing live poultry markets, among other warning signs.
Is US bird flu outbreak in cattle a global risk to humans? | ABS-CBN News
A second type of avian influenza has been detected in cattle in the US state of Nevada. What does it mean for people?
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.
Second H5N1 strain detected in US dairy herds
More dangerous bird flu variant spreading among US cattle
The D1.1 strain of H5N1 avian flu is blamed for one man’s death and putting a teenager in intensive care
Deadly strain of bird flu linked to man's 2024 death appears in Nevada dairy cows
Herds of cattle in Nevada tested positive for the strain of H5N1 bird flu never before seen in cows, state agriculture officials confirmed. CBS News' Andres ...
A second version of bird flu is infecting cows. What does that mean?
While the risk to humans of exposure from cows or milk remains low, this new flu spillover from birds into cows raises the need for continued surveillance.
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.
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 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
More from GMQC: https://www.wqad.com/good-morning-quad-cities More news: https://www.wqad.com Subscribe to WQAD News 8 on YouTube: https://www.youtube.com/c...
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 …
"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 - 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 …
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.
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
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
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