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Source: https://www.kcra.com/article/butte-c...flock/63332150
Bird flu outbreak detected in Butte County backyard flock, officials say
KCRA logo Updated: 10:42 AM PST Jan 3, 2025
Jonathan Ayestas
BUTTE VALLEY, Calif. —
Butte County officials on Friday confirmed a bird flu outbreak in a backyard chicken flock, the latest case since Gov. Gavin Newsom declared a state of emergency in December.
Previous coverage in the video player above
Data from the U.S. Department of Agriculture show that the infections affected 70 birds in the non-commercial flock on Dec. 31...Comment
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Source: https://www.sierradailynews.com/stat...-flu-outbreak/
Alert for Hunters and Bird Handlers Amid Bird Flu Outbreak
Wed, January 8, 2025
The Butte County Department of Public Health (BCPH) has received notification from the California Department of Public Health (CDPH) of a bird flu (H5N1) infection in a commercial upland game bird farm in Butte County. Upland game birds are non-waterfowl birds that live in heavy ground cover and are often hunted for game. BCPH wants bird hunters and those who may be exposed to upland birds to be aware of the potential for H5N1 exposure and take steps to protect themselves, hunting dogs, and falconry birds.
The California Department of Food and Agriculture (CDFA) notified the farm on December 31, 2024, about the birds that tested positive for bird flu, and required the farm to immediately stop all sales of birds. All birds on the property will be depopulated to prevent the spread of the disease.
According to CDFA, the farm does not sell birds to the general public; they breed birds to sell to hunting clubs. BCPH is working with CDFA and CDPH to confirm that local hunting clubs that may have recently purchased birds from this farm have been notified...Comment
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Bird flu found in Yolo County backyard poultry flock, health officials say
January 23, 2025
At least one bird in a Yolo County poultry flock tested positive this week for avian influenza, an illness that has spread through the country and prompted Gov. Gavin Newsom to declare a state of emergency last month. Avian influenza, H5N1, had been detected in wild birds in Yolo County since 2022 but never before in a backyard poultry flock, according to a Thursday news release from county officials. Two people were exposed to the birds, but exhibited no symptoms.
Read more at: https://www.sacbee.com/news/local/ar...orylink=cpy
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Bird flu detected in Yolo County backyard flock as public risk remains low, officials say
January 23, 2025
LOCAL NEWS Bird flu detected in Yolo County backyard flock as public risk remains low, officials say
By Brandon Downs
January 23, 2025 / 1:23 PM PST / CBS Sacramento
YOLO COUNTY – Yolo County officials announced Thursday that bird flu was detected in a backyard poultry flock, making it the first detection of bird flu in poultry in the county.
Health officials say the birds have either died or been euthanized, so there is no ongoing risk to other animals or humans. They also said it is likely that the infection was acquired outside of Yolo County.
Two people who were exposed to the birds are being monitored and remain asymptomatic.
continued: https://www.cbsnews.com/sacramento/n...ackyard-flock/Comment
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Bird Flu Detected in Yolo County Backyard Poultry Flock
01/23/2025 12:00 PM
PRESS RELEASE
Avian influenza, also known as bird flu and influenza A (H5N1), has been detected in a backyard poultry flock in Yolo County, according to the Yolo County Health and Human Services Agency and the Yolo County Agricultural Commissioner. While bird flu has been detected in wild birds in Yolo County since 2022, this is the first detection of bird flu in poultry in the county. Since 2022, bird flu has been detected in 100 commercial flocks and 37 backyard flocks in California, affecting over 23 million birds.
All birds in the affected backyard flock have died or been euthanized, so there is no ongoing risk to other animals or humans. New birds were introduced into the flock from a source in another county days before the birds began exhibiting symptoms, making it likely that the infection was acquired elsewhere and imported into Yolo County. Yolo County Public Health is monitoring two people exposed to the affected birds; both remain asymptomatic.
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For more information about bird flu in California, please visit the California Department of Public Health’s Bird Flu website and the California Department of Food and Agriculture’s (CDFA) on poultry and dairy infections. CDFA is the lead agency working with poultry and livestock producers across the state to address the current outbreak. Recently, CDFA placed a ban on poultry and dairy cattle exhibitions at fairs and shows in order to protect the remaining unaffected herds and flocks across California.
Yolo County residents with backyard flocks can obtain more information on how to protect their birds by visiting www.cdfa.ca.gov/ahfss/Animal_Health/BioSpecies/BioPoultry.html. The wastewater levels of influenza A (H5) in Yolo County are available at Data.WasteWaterScan.org. Organizations that work with dairy, poultry, or wildlife can request personal protective equipment by contacting EMSDutyOfficer@YoloCounty.gov.
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bump this
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WOAH: California Reports New H5N9 Reassortant In Ducks
#18,584
While HPAI H5N1 has remained the dominant H5 subtype around the globe, we've recently seen inroads made by an HPAI H5N5 subtype in Canada and parts of Europe (see The Continued Expansion of HPAI H5N5).
These new subtypes arise due to reassortment, which occurs when two different flu viruses infect the same host - share genetic material - and produce a hybrid.
Most reassortants will be unable to compete with their parental strains, but sometimes a new and viable subtype is created. HPAI H5N5 has shown some modest success in this regard, but it remains a minor player.
Today WOAH has reported (#6201) that a new HPAI H5N9 reassortment has been detected at a duck farm in Merced County, California. This HPAI subtype was last reported during the 2016/2017 H5N8 epizootic in Europe (see DEFRA: Update On HPAI & LPAI Avian Flu Outbreaks in France)
Details are scant, but they provide the following epidemiological data.
SOURCE OF EVENT OR ORIGIN OF INFECTION- Unknown or inconclusive
Highly pathogenic avian influenza (HPAI) H5N9, Eurasian lineage goose/Guangdong clade 2.3.4.4b and HPAI H5N1 clade 2.3.4.4b were confirmed in a commercial duck premises in Merced County, CA. This is the first confirmed case of HPAI H5N9 in poultry in the United States. The USDA Animal and Plant Health Inspection Service (APHIS), in conjunction with State Animal Health and Wildlife Officials, are conducting comprehensive epidemiological investigations and enhanced surveillance in response to the HPAI related events.
For now, this appears to be a one-off event, and there is no word on its pathogenicity. Whether HPAI H5N9 has `legs', and will spread beyond this duck farm - or will spontaneously appear elsewhere - remains to be seen.
But it does remind us that nature's gain of function (GOF) field experiment continues, and we should be prepared for surprises.
All medical discussions are for educational purposes. I am not a doctor, just a retired paramedic. Nothing I post should be construed as specific medical advice. If you have a medical problem, see your physician.Comment
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[bolding is mine]
1/27/25
US reports first outbreak of H5N9 bird flu in poultry
PARIS (Reuters) -The United States has reported its first outbreak of H5N9 bird flu in poultry on a duck farm in California, the World Organisation for Animal Health (WOAH) said on Monday.
U.S. authorities also detected the more common H5N1 strain on the same farm in Merced County, California, they said in a report to Paris-based WOAH, adding that the almost 119,000 birds on the farm had been killed by Dec. 2.
The strain that has caused most damage in recent years has been H5N1. H5N9 is rarer.
"This is the first confirmed case of HPAI H5N9 in poultry in the United States," the U.S. Department of Agriculture said in the report to the WOAH.
"The USDA Animal and Plant Health Inspection Service (APHIS), in conjunction with State Animal Health and Wildlife Officials, are conducting comprehensive epidemiological investigations and enhanced surveillance in response to the HPAI related events," it added.
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