Please welcome H5N9 to the Bird Flu stage

 

Photo:  Thailand Medical News

Bottom headline:  Reuters, 1/27/2025

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.

Related reading:

CBS News, 1/28/2025

What is H5N9 and how is it different from H5N1? 

Scientists classify bird flu viruses by which kind of two key proteins are inside of them: the hemagglutinin, like H5 or H3, and the neuraminidase, like N1 or N9. 

Different blends of those two proteins alongside many other mutations elsewhere in the virus can affect how sick people and animals get and how it spreads.

Related posts:

January 2025

Please welcome Connecticut and Rhode Island to the Bird Flu stage.  (1/28)

Please welcome Pennsylvania to the Bird Flu stage.  (1/28)

Trump response to bird flu:  Fasten your seat belts, it's going to be a bumpy ride.  (1/27)

Sioux County Iowa (human population 36,246) leads bird flu hit parade with 12,108,000 depopulated chickens.  (1/27)

That's assuming pet food companies have safety plans in the first place.  (1/27)

Snow geese are dying in Delaware .  (1/26)

100,000 Long Island ducks.  (1/25)

Factory farms (aka CAFOs) and bird flu.  (1/24)

2.8 hens depopulated in a single North Carolina flock.  (1/23)

Bird flu tally:  20,000,000 depopulated egg-laying chickens in past 3 months.  (1/22)

Please welcome Georgia to the bird flu stage!  (1/21)

Please welcome Maryland to the bird flu stage!  (1/20)

Food fads for pets put them at risk of bird flu.  (1/18)

7 things you can do to prevent getting bird flu.  (1/17)

Another impact of H5M1 on dairy cows.  (1/16)

It's 2025 and bird flu is not going away.  (1/15)

Taxpayers on the hook for dead chickens.  (1/14)

Cats + raw milk = bad outcome.  (1/13)

Bird flu infects barnyard flock in metro Detroit.  (1/12)

Which states lost the most commercial birds to HPAI in 2024? (1/11)

Scientists keep tabs on bird flu's silent mutations.  (1/10)

First fatal human H5N1 infection occurs in Louisiana.  (1/7)

Mr. Ed is bummed about this latest H5N1 bird flu news.  (1/6)

Punning the news:  Paying egg-stra at the grocery store.  (1/5)

Newsweek reporter feels stimulated about bird flu.  (1/4)

Maybe ham will be on the table in many Michigan homes this Thanksgiving.  (1/3)

Scientists are racing to find a new way to freak out MAGA.  (1/3)

Wisconsin dairy farms as "dry tinder" for H5N1 outbreak.  (1/2)

New England Journal of Medicine warns of emerging threat of H5N1 to humans.  (1/1)

December 2024

Keeping tabs on human-to-human transmission of H5N1.  (12/31)

The key is in the lock but it doesn't yet open the door.  (12/31)

Bird flu and normalcy bias.  (12/30)

Bird poop will save us from the next pandemic.  (12/29)

Iowa records first human case of bird flu.  (12/28)

Wildlife sanctuary in Washington State provides on refuge from bird flu.  (12/27)

Lax response by US government allows bird flu to spread nationwide.  (12/22)

Iowa reports first human case of bird flu.  (12/21) 

Bird flu in humans; it's here in the USA.  (12/20)

Bird flu emergency in California:  300 herds test positive in last 30 days.  (12/19)

Bird flu in chickens:  IT'S EVERYWHERE IT'S EVERYWHERE!!  (12/18)

Simply deadly:  Raw milk in an era of widespread bird flu.  (12/17)

Coming soon to your cat:  Bird flu.  (12/16)

Bird flu has now reach 49 states and 560 counties.  (12/15)

Bird flu slaughters northern gannets in eastern Canada.  (12/15)

Bird flu comes to British Columbia. (12/14)

What worries pandemic experts most about bird flu.  (12/13)

Will Trump administration health policies spark another pandemic?  (12/12)

Let's do the math about those 6,000,000 Iowa laying hens "affected" by bird flu.  (12/10)

Top 5 states with confirmed cases of bird flu in cattle herds.  (12/10)