Colorado - Bird flu in mammals and livestock 2023-2025

[sharon sanders]

New posted this morning:

https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/hpai-confirmed-cases-livestock

[sharon sanders]

I did add the dairy "replacements" to our list but I have no idea what that is. Listed as cattle. I will amend if this is a USDA typo.

[sharon sanders]

Dairy replacement is apparently bulk tank positive H5N1 result.

https://ag.colorado.gov/animal-health/reportable-diseases/avian-influenza/hpai-in-dairy-cattle

[Pathfinder]

hat-tip Rick Bright
@RickABright

Colorado Department of Public Health & Environment
09 Aug Influenza A (Highly Pathogenic Avian Influenza H5N1) in domestic cats


Six feline cases of Influenza A (HPAI H5N1) have been diagnosed in domestic cats in Colorado during 2024. One of these cases was directly associated with a known infected commercial dairy facility. Two of the six cases were indoor only cats with no direct exposures to the virus. Three of the six cases were known indoor/outdoor cats that hunted mice and/or small birds as prey and also spent time indoors with their owners. Five of the six cases have presented with similar clinical signs and disease progression: an initial complaint of lethargy and inappetence, followed by progressive respiratory signs in some and fairly consistent progressive neurologic signs in most. Several of these cases were tested for rabies preceding diagnosis with H5N1 infection due to the indistinguishable presentation once neurologic signs presented. HPAI H5N1 infection should be considered in domestic felines even if all of the risk factors or clinical signs are not present. There is high abundance of virus in Colorado at this time, predominantly being detected in domestic dairy cattle in commercial dairy herds with spillover into mammals and wild birds on and near these premises. Notably the B3.13 strain of the Eurasian 2.3.4.4b clade H5N1 virus has been spreading in animals not historically attributed as reservoirs for the HPAI virus. This lineage of virus has not been detected in migratory waterfowl at this time.
Click here for our current guidance document for veterinarians evaluating feline cases for HPAI infection.
Any questions, please refer to the CDPHE zoonoses team at cdphe_zoonoses@state.co.us or the Animal Health Division with CDA at animalhealth@state.co.us.

https://www.colovma.org/cvma-news/in...domestic-cats/

Detections of Highly Pathogenic Avian Influenza in Mammals

Last Modified: August 20, 2024
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state county date_collected date_detected hpai_strain species

Colorado Larimer 7/24/2024 7/29/2024 EA H5N1 Domestic cat
Colorado Larimer 7/12/2024 7/22/2024 EA H5N1 Domestic cat
Colorado Larimer 7/16/2024 7/22/2024 EA H5N1 Domestic cat
Colorado Larimer 7/14/2024 7/22/2024 EA H5N1 Domestic cat
Colorado Adams 5/30/2024 6/24/2024 EA H5N1 Domestic cat
Colorado Morgan 5/25/2024 6/6/2024 EA H5N1 Domestic cat

https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/mammals

[sharon sanders]

A reherd - USDA is not counting this re-infection as a new herd. But really....it is a new infection.







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The above is an example of why we have gone to reporting a "range".


FluTrackers.com
@FluTrackers
·
9h


US -USDA listed 13 more #H5N1 items for California (dairy cattle
herds=12).This makes the known CA range of 491 and the US
known mammal livestock number range at 709.

We are listing as ranges now due to increasing fuzziness in
reporting as numbers grow.

https://flutrackers.com/forum/forum/united-states/h5n1-tracking-af/california/989719-california-avian-flu-in-mammals-and-livestock-2024?p=1001682#post1001682…

[sharon sanders]

Óscar A. Contreras


@oscarcontrarius

How did a CO dairy herd that was released from quarantine get infected with #H5N1 #birdflu again? "We do not believe that this was a new introduction of the virus, but we are unable to confirm this through whole genome sequencing at this time," a CDA spox tells me


Óscar A. Contreras


@oscarcontrarius
20h

So what happened here? Because the CDPHE & CDA are continuing to conduct bulk milk tank testing, "CO059 tested positive for HPAI (#birdflu) in the testing round conducted the week of November 23." Soooo... could it have been a poultry introduction?

Óscar A. Contreras


@oscarcontrarius

Here's what the CDA says: "Additional testing is being conducted by the USDA to determine the genotype of the virus that infected the dairy," CDA spox told me. About the outbreak in Weld on 11/14? CDA says that's genotype D1.1, not B3.13. Some answers, still many Qs. /

10:56 PM · Dec 6, 2024

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https://wahis.woah.org/#/in-review/4451

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Detections of Highly Pathogenic Avian Influenza in Mammals

Last Modified: January 06, 2025
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¹ To protect data confidentiality, the county and mapped locations of these detections represent the approximate location of the state capitol.
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https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/mammals

[Lance]

https://wahis.woah.org/#/in-review/4451

[Pathfinder]

Detections of Highly Pathogenic Avian Influenza in Mammals

Last Modified: January 13, 2025
...
State County Date Collected Date Detected HPAI Strain Species

Colorado	Arapahoe	12/10/2024	1/3/2025	EA/AM H5N1	Domestic cat
Colorado	Kit Carson	12/11/2024	1/3/2025	EA/AM H5N1	Domestic cat

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https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/mammals