#wildbirds — Public Fediverse posts on home.social

DoomsdaysCW @[email protected] · 2025-02-08 · 17:00 UTC

New #BirdFlu variant found in #DairyCattle. Can #H5N1 be transmitted to humans? [Apparently, the answer is, "YES!"]

According to the the US Department of Agriculture, this is the first ever detection of this bird flu virus variant in dairy cattle.

by Jonathan Limehouse, February 6, 2025, updated February 7, 2025

"The variant of bird flu that killed a Louisiana resident has now been found in dairy cows. Until now, the human cases of bird flu traced to cattle have been mild, mostly #EyeInfections.

"But the U.S. Department of Agriculture confirmed that a strain previously found only in #WildBirds has turned up in dairy herds in #Nevada ‒ raising concerns that future human infections could be more serious.

"Bird flu has triggered a nationwide egg shortage and price hikes in recent months, as infected chickens had to be put to death. It has also coursed through dairy farms in 16 states since last March, according to the USDA, reducing milk production. More than 60 #farmworkers on both dairy and poultry farms have been infected since then, all of whom recovered.

"But one Louisiana resident died last month after contracting bird flu from a backyard flock. That person, who was older and chronically ill, but not otherwise identified, was infected with the D.1.1 variant now seen in the Nevada cows. A Canadian teenager hospitalized with bird flu in November was also infected with D.1.1.

"#D11 is common among the #starlings that migrate through #Nevada in the winter and might have carried the virus into the state, the Nevada Department of Agriculture said in a social media post.

"The USDA said it is working with the state department of agriculture to investigate the Nevada outbreak and limit its spread.

"Until last week, all bird flu in dairy herds had been identified as the B3.13 variant, which was believed to have come from wild birds in late 2023 or early 2024."

https://www.usatoday.com/story/news/health/2025/02/06/bird-flu-strain-dairy-cows-humans-transmitted/78290857007/
#HPAINews #HPAIVariant #B313 #BirdFlu #BirdMigrations #StarlingMigrations #Cattle #HPAI #AvianInfluenza #BirdFlu #USHealth #CDCCensorship

#birdflu #dairycattle #h5n1 #eyeinfections #wildbirds #nevada

ETIDIoH @[email protected] · 2024-12-06 · 17:09 UTC

#Transmission #dynamics of highly pathogenic avian #influenza virus at the #wildlife – #poultry – #environmental #interface: A case study

Source: OneHealth, https://www.sciencedirect.com/science/article/pii/S2352771424002581?via%3Dihub

Abstract
Avian influenza viruses (AIVs) regularly circulate between wild and domestic bird populations. Following several high-profile outbreaks, highly pathogenic AIVs (HPAIV) with zoonotic potential have been the subject of increasing attention. While we know that HPAIV is transmitted between domestic birds, wildlife, and the environment, little is known about persistence and spillover/back at these interfaces. We integrated the test results of samples collected on and around an infected domestic poultry premise (IP) where H5N1 HPAIV was confirmed in a flock of poultry in 2022 in Southern Ontario, Canada to explore the transmission cycle of AIVs in wildlife and the environment. We sampled a captive flock of Mallards (Anas platyrhynchos) that resided on site, sediment samples collected from water bodies on site, and examined samples collected through surveillance within a 100 km radius of the IP from live wild ducks and sick and dead wildlife. We found serologic evidence of H5 exposure in the captive mallards that resided on site despite no evidence of morbidity or mortality in these birds and no PCR positive detections from samples collected at two different timepoints. Genetic material from the same H5N1 HPAIV subtype circulating in the domestic birds and from low pathogenicity avian influenza viruses were detected in wetlands on site. The results of live and sick and dead surveillance conducted within a 100 km radius confirmed that the virus was circulating in wildlife before and after IP confirmation. These results suggest that biosecurity remains the most critical aspect of minimising spillover/back risk in a virus that has been shown to circulate in asymptomatic wild birds and persist in the surrounding environment.