US - H5N1 Avian Flu in Mammal Livestock List - continued...

[sharon sanders]

As of December 13, 2024 the transparency has become clouded - there are confirmed herds with the same confirmation date being reported later on multiple days.

All state totals and the US total are the known number of herds and are a range only - not absolute certain counts.

Difference from USDA count highlighted in green.

hat tip Pathfinder, Commonground, Shiloh



Cumulative H5N1 Mammal Livestock list + National Milk Testing Strategy (NMTS), by state


As of August 4, 2025 11:00 pm ET a total of USDA confirmed + highly probable herds via states = 1,083


Arizona = 5 dairy cattle herds, incl. 1 bulk tank test result, also listed as "affected" by NMTS

California= 771: all dairy cattle herds, also listed as "affected" by NMTS

Colorado = 65: dairy cattle herds (one herd counted twice as also reinfected link) and dairy bulk tank test results, also listed as "affected" by NMTS

Idaho = 108: 107 dairy cattle herds, 1 alpaca herd, also listed as "affected" by NMTS

Iowa = 13: all dairy cattle herds

Kansas = 4: all dairy cattle herds

Michigan = 31: all dairy cattle herds, also listed as "affected" by NMTS

Minnesota = 11: 9 dairy cattle herds (1 is bulk milk testing), + 1 goat herd link , + in March '25 1 bulk milk (indicative of a herd) per state rpt link., t, also listed as "affected" by NMTS

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results, also listed as "affected" by NMTS

New Mexico = 9: all dairy herds

North Carolina = 1 dairy herd

Ohio = 1 dairy herd

Oklahoma = 2: all dairy cattle herds

Oregon = 1 swine herd link

South Dakota = 7: all dairy cattle

Texas = 29: all dairy herds, also listed as "affected" by NMTS

Utah = 13: all dairy herd

Wyoming = 1 dairy herd


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

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

[sharon sanders]

As of December 13, 2024 the transparency has become clouded - there are confirmed herds with the same confirmation date being reported later on multiple days.

All state totals and the US total are the known number of herds and are a range only - not absolute certain counts.

Difference from USDA count highlighted in green.

hat tip Pathfinder, Commonground, Shiloh



Cumulative H5N1 Mammal Livestock list + National Milk Testing Strategy (NMTS), by state


As of August 6, 2025 7:40 pm ET a total of USDA confirmed + highly probable herds via states = 1,126


Arizona = 5 dairy cattle herds, incl. 1 bulk tank test result, also listed as "affected" by NMTS

California= 814: all dairy cattle herds, also listed as "affected" by NMTS (43 herds are reinfections link )

Colorado = 65: dairy cattle herds (one herd counted as reinfected link) and dairy bulk tank test results, also listed as "affected" by NMTS

Idaho = 108: 107 dairy cattle herds, 1 alpaca herd, also listed as "affected" by NMTS

Iowa = 13: all dairy cattle herds

Kansas = 4: all dairy cattle herds

Michigan = 31: all dairy cattle herds, also listed as "affected" by NMTS

Minnesota = 11: 9 dairy cattle herds (1 is bulk milk testing), + 1 goat herd link , + in March '25 1 bulk milk (indicative of a herd) per state rpt link., t, also listed as "affected" by NMTS

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results, also listed as "affected" by NMTS

New Mexico = 9: all dairy herds

North Carolina = 1 dairy herd

Ohio = 1 dairy herd

Oklahoma = 2: all dairy cattle herds

Oregon = 1 swine herd link

South Dakota = 7: all dairy cattle

Texas = 29: all dairy herds, also listed as "affected" by NMTS

Utah = 13: all dairy herd

Wyoming = 1 dairy herd


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

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

[sharon sanders]

As of December 13, 2024 the transparency has become clouded - there are confirmed herds with the same confirmation date being reported later on multiple days.

All state totals and the US total are the known number of herds and are a range only - not absolute certain counts.

Difference from USDA count highlighted in green.

hat tip Pathfinder, Commonground, Shiloh



Cumulative H5N1 Mammal Livestock list + National Milk Testing Strategy (NMTS), by state


As of September 5, 2025 3:20 pm ET a total of USDA confirmed + highly probable herds via states = 1,127


Arizona = 5 dairy cattle herds, incl. 1 bulk tank test result, also listed as "affected" by NMTS

California= 814: all dairy cattle herds, also listed as "affected" by NMTS (43 herds are reinfections link )

Colorado = 65: dairy cattle herds (one herd counted as reinfected link) and dairy bulk tank test results, also listed as "affected" by NMTS

Idaho = 108: 107 dairy cattle herds, 1 alpaca herd, also listed as "affected" by NMTS

Iowa = 13: all dairy cattle herds

Kansas = 4: all dairy cattle herds

Michigan = 31: all dairy cattle herds, also listed as "affected" by NMTS

Minnesota = 11: 9 dairy cattle herds (1 is bulk milk testing), + 1 goat herd link , + in March '25 1 bulk milk (indicative of a herd) per state rpt link., t, also listed as "affected" by NMTS

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results, also listed as "affected" by NMTS

New Mexico = 9: all dairy herds

North Carolina = 1 dairy herd

Ohio = 1 dairy herd

Oklahoma = 2: all dairy cattle herds

Oregon = 1 swine herd link

South Dakota = 7: all dairy cattle

Texas = 30: all dairy herds, also listed as "affected" by NMTS

Utah = 13: all dairy herd

Wyoming = 1 dairy herd


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

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

[sharon sanders]

As of December 13, 2024 the transparency has become clouded - there are confirmed herds with the same confirmation date being reported later on multiple days.

All state totals and the US total are the known number of herds and are a range only - not absolute certain counts.

Difference from USDA count highlighted in green.

hat tip Pathfinder, Commonground, Shiloh



Cumulative H5N1 Mammal Livestock list + National Milk Testing Strategy (NMTS), by state


As of October 14, 2025 4:40 pm ET a total of USDA confirmed + highly probable herds via states = 1,129


Arizona = 5 dairy cattle herds, incl. 1 bulk tank test result, also listed as "affected" by NMTS

California= 814: all dairy cattle herds, also listed as "affected" by NMTS (43 herds are reinfections link )

Colorado = 65: dairy cattle herds (one herd counted as reinfected link) and dairy bulk tank test results, also listed as "affected" by NMTS

Idaho = 109: 108 dairy cattle herds, 1 alpaca herd, also listed as "affected" by NMTS (News report on Oct. 10 herd posting says this is a dairy cattle herd.)

Iowa = 13: all dairy cattle herds

Kansas = 4: all dairy cattle herds

Michigan = 31: all dairy cattle herds, also listed as "affected" by NMTS

Minnesota = 11: 9 dairy cattle herds (1 is bulk milk testing), + 1 goat herd link , + in March '25 1 bulk milk (indicative of a herd) per state rpt link., t, also listed as "affected" by NMTS

Nebraska= 1 dairy herd

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results, also listed as "affected" by NMTS

New Mexico = 9: all dairy herds

North Carolina = 1 dairy herd

Ohio = 1 dairy herd

Oklahoma = 2: all dairy cattle herds

Oregon = 1 swine herd link

South Dakota = 7: all dairy cattle

Texas = 30: all dairy herds, also listed as "affected" by NMTS

Utah = 13: all dairy herd

Wyoming = 1 dairy herd


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

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

[sharon sanders]

As of December 13, 2024 the transparency has become clouded - there are confirmed herds with the same confirmation date being reported later on multiple days.

All state totals and the US total are the known number of herds and are a range only - not absolute certain counts.

Difference from USDA count highlighted in green.

hat tip Pathfinder, Commonground, Shiloh



Cumulative H5N1 Mammal Livestock list + National Milk Testing Strategy (NMTS), by state


As of October 30, 2025 2:22 pm ET a total of USDA confirmed + highly probable herds via states = 1,135


Arizona = 5 dairy cattle herds, incl. 1 bulk tank test result, also listed as "affected" by NMTS

California= 820: all dairy cattle herds, also listed as "affected" by NMTS (49 herds are reinfections linklink )

Colorado = 65: dairy cattle herds (one herd counted as reinfected link) and dairy bulk tank test results, also listed as "affected" by NMTS

Idaho = 109: 108 dairy cattle herds, 1 alpaca herd, also listed as "affected" by NMTS (News report on Oct. 10 herd posting says this is a dairy cattle herd.)

Iowa = 13: all dairy cattle herds

Kansas = 4: all dairy cattle herds

Michigan = 31: all dairy cattle herds, also listed as "affected" by NMTS

Minnesota = 11: 9 dairy cattle herds (1 is bulk milk testing), + 1 goat herd link , + in March '25 1 bulk milk (indicative of a herd) per state rpt link., t, also listed as "affected" by NMTS

Nebraska= 1 dairy herd

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results, also listed as "affected" by NMTS

New Mexico = 9: all dairy herds

North Carolina = 1 dairy herd

Ohio = 1 dairy herd

Oklahoma = 2: all dairy cattle herds

Oregon = 1 swine herd link

South Dakota = 7: all dairy cattle

Texas = 30: all dairy herds, also listed as "affected" by NMTS

Utah = 13: all dairy herd

Wyoming = 1 dairy herd


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

https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/livestock/nmts[/QUOTE]

[sharon sanders]

As of December 13, 2024 the transparency has become clouded - there are confirmed herds with the same confirmation date being reported later on multiple days.

All state totals and the US total are the known number of herds and are a range only - not absolute certain counts.

Difference from USDA count highlighted in green.

hat tip Pathfinder, Commonground, Shiloh



Cumulative H5N1 Mammal Livestock list + National Milk Testing Strategy (NMTS), by state


As of December 1, 2025 11:29 am ET - a total of USDA confirmed + highly probable herds via states = 1,136


Arizona = 5 dairy cattle herds, incl. 1 bulk tank test result, also listed as "affected" by NMTS

California= 821: all dairy cattle herds, also listed as "affected" by NMTS (49 herds are reinfections link link )

Colorado = 65: dairy cattle herds (one herd counted as reinfected link) and dairy bulk tank test results, also listed as "affected" by NMTS

Idaho = 109: 108 dairy cattle herds, 1 alpaca herd, also listed as "affected" by NMTS (News report on Oct. 10 herd posting says this is a dairy cattle herd.)

Iowa = 13: all dairy cattle herds

Kansas = 4: all dairy cattle herds

Michigan = 31: all dairy cattle herds, also listed as "affected" by NMTS

Minnesota = 11: 9 dairy cattle herds (1 is bulk milk testing), + 1 goat herd link , + in March '25 1 bulk milk (indicative of a herd) per state rpt link., t, also listed as "affected" by NMTS

Nebraska= 1 dairy herd

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results, also listed as "affected" by NMTS

New Mexico = 9: all dairy herds

North Carolina = 1 dairy herd

Ohio = 1 dairy herd

Oklahoma = 2: all dairy cattle herds

Oregon = 1 swine herd link

South Dakota = 7: all dairy cattle

Texas = 30: all dairy herds, also listed as "affected" by NMTS

Utah = 13: all dairy herd

Wyoming = 1 dairy herd


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

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

[sharon sanders]

As of December 13, 2024 the transparency has become clouded - there are confirmed herds with the same confirmation date being reported later on multiple days.

All state totals and the US total are the known number of herds and are a range only - not absolute certain counts.

Difference from USDA count highlighted in green.

hat tip Pathfinder, Commonground, Shiloh



Cumulative H5N1 Mammal Livestock list + National Milk Testing Strategy (NMTS), by state


As of December 15, 2025 11:45 am ET - a total of USDA confirmed + highly probable herds via states = 1,137


Arizona = 5 dairy cattle herds, incl. 1 bulk tank test result, also listed as "affected" by NMTS

California= 821: all dairy cattle herds, also listed as "affected" by NMTS (49 herds are reinfections link link)

Colorado = 65: dairy cattle herds (one herd counted as reinfected link) and dairy bulk tank test results, also listed as "affected" by NMTS

Idaho = 109: 108 dairy cattle herds, 1 alpaca herd, also listed as "affected" by NMTS (News report on Oct. 10 herd posting says this is a dairy cattle herd.)

Iowa = 13: all dairy cattle herds

Kansas = 4: all dairy cattle herds

Michigan = 31: all dairy cattle herds, also listed as "affected" by NMTS

Minnesota = 11: 9 dairy cattle herds (1 is bulk milk testing), + 1 goat herd link , + in March '25 1 bulk milk (indicative of a herd) per state rpt link., t, also listed as "affected" by NMTS

Nebraska= 1 dairy herd

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results, also listed as "affected" by NMTS

New Mexico = 9: all dairy herds

North Carolina = 1 dairy herd

Ohio = 1 dairy herd

Oklahoma = 2: all dairy cattle herds

Oregon = 1 swine herd link

South Dakota = 7: all dairy cattle

Texas = 30: all dairy herds, also listed as "affected" by NMTS

Utah = 13: all dairy herd

Wisconsin = 1 dairy herd

Wyoming = 1 dairy herd


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

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