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US - H5N1 Avian Flu in Mammal Livestock List

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 by herd

As of May 6, 2025 1:30 pm ET a total of USDA confirmed + highly probable (via state announcement) = 1,055​


Arizona = 3 dairy cattle herds, incl. bulk tank test result

California= 766: all dairy cattle herds

Colorado = 65: dairy cattle herds (one herd counted twice as also reinfected link) and dairy bulk tank test results

Idaho = 89: 88 dairy cattle herds, 1 alpaca herd

​Iowa = 13: all dairy cattle herds

Kansas = 4​​: all dairy cattle herds

Michigan = 31: all dairy cattle herds

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.

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results

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 = 27: all dairy herd

Utah = 13: all dairy herd ​​

Wyoming = 1 dairy herd​


https://www.aphis.usda.gov/livestoc...pai-detections/hpai-confirmed-cases-livestock
 
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 by herd

As of May 7, 2025 11:15 pm ET a total of USDA confirmed + highly probable (via state announcement) = 1,057​


Arizona = 3 dairy cattle herds, incl. bulk tank test result

California= 766: all dairy cattle herds

Colorado = 65: dairy cattle herds (one herd counted twice as also reinfected link) and dairy bulk tank test results

Idaho = 91: 90 dairy cattle herds, 1 alpaca herd

​Iowa = 13: all dairy cattle herds

Kansas = 4​​: all dairy cattle herds

Michigan = 31: all dairy cattle herds

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.

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results

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 = 27: all dairy herd

Utah = 13: all dairy herd ​​

Wyoming = 1 dairy herd​


https://www.aphis.usda.gov/livestoc...pai-detections/hpai-confirmed-cases-livestock
 
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 by herd

As of May 15, 2025 9:10 am ET a total of USDA confirmed + highly probable (via state announcement) = 1,068​


Arizona = 4 dairy cattle herds, incl. bulk tank test result

California= 766: all dairy cattle herds

Colorado = 65: dairy cattle herds (one herd counted twice as also reinfected link) and dairy bulk tank test results

Idaho = 101: 100 dairy cattle herds, 1 alpaca herd

​Iowa = 13: all dairy cattle herds

Kansas = 4​​: all dairy cattle herds

Michigan = 31: all dairy cattle herds

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.

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results

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 = 27: all dairy herd

Utah = 13: all dairy herd ​​

Wyoming = 1 dairy herd​


https://www.aphis.usda.gov/livestoc...pai-detections/hpai-confirmed-cases-livestock
 
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 by herd

As of May 16, 2025 9:30 am ET a total of USDA confirmed + highly probable (via state announcement) = 1,070​


Arizona = 4 dairy cattle herds, incl. bulk tank test result

California= 766: all dairy cattle herds

Colorado = 65: dairy cattle herds (one herd counted twice as also reinfected link) and dairy bulk tank test results

Idaho = 101: 100 dairy cattle herds, 1 alpaca herd

​Iowa = 13: all dairy cattle herds

Kansas = 4​​: all dairy cattle herds

Michigan = 31: all dairy cattle herds

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.

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results

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 herd

Utah = 13: all dairy herd ​​

Wyoming = 1 dairy herd​


https://www.aphis.usda.gov/livestoc...pai-detections/hpai-confirmed-cases-livestock
 
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 by herd

As of May 21, 2025 10:30 am ET a total of USDA confirmed + highly probable (via state announcement) = 1,075​


Arizona = 4 dairy cattle herds, incl. bulk tank test result

California= 766: all dairy cattle herds

Colorado = 65: dairy cattle herds (one herd counted twice as also reinfected link) and dairy bulk tank test results

Idaho = 106: 105 dairy cattle herds, 1 alpaca herd

​Iowa = 13: all dairy cattle herds

Kansas = 4​​: all dairy cattle herds

Michigan = 31: all dairy cattle herds

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.

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results

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 herd

Utah = 13: all dairy herd ​​

Wyoming = 1 dairy herd​


https://www.aphis.usda.gov/livestoc...pai-detections/hpai-confirmed-cases-livestock
 
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 by state


As of May 23, 2025 12:55 pm ET a total of USDA confirmed + highly probable (via state announcement) = 1,077​


Arizona = 4 dairy cattle herds, incl. bulk tank test result

California= 766: all dairy cattle herds

Colorado = 65: dairy cattle herds (one herd counted twice as also reinfected link) and dairy bulk tank test results

Idaho = 108: 107 dairy cattle herds, 1 alpaca herd

​Iowa = 13: all dairy cattle herds

Kansas = 4​​: all dairy cattle herds

Michigan = 31: all dairy cattle herds

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.

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results

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 herd

Utah = 13: all dairy herd ​​

Wyoming = 1 dairy herd​


https://www.aphis.usda.gov/livestoc...pai-detections/hpai-confirmed-cases-livestock
 
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 by state


As of June 5, 2025 2:45 pm ET a total of USDA confirmed + highly probable (via state announcement) = 1,078​


Arizona = 4 dairy cattle herds, incl. bulk tank test result

California= 767: all dairy cattle herds

Colorado = 65: dairy cattle herds (one herd counted twice as also reinfected link) and dairy bulk tank test results

Idaho = 108: 107 dairy cattle herds, 1 alpaca herd

​Iowa = 13: all dairy cattle herds

Kansas = 4​​: all dairy cattle herds

Michigan = 31: all dairy cattle herds

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.

Nevada = 11 dairy herds, 4 confirmed herds with D1.1 strain (wild bird strain), includes some bulk tanks results

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 herd

Utah = 13: all dairy herd ​​

Wyoming = 1 dairy herd​


https://www.aphis.usda.gov/livestoc...pai-detections/hpai-confirmed-cases-livestock
 
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 June 20, 2025 3:10 pm ET a total of USDA confirmed + highly probable herds via states = 1,078​


Arizona = 4 dairy cattle herds, incl. 1 bulk tank test result, also listed as "affected" by NMTS

California= 767: 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
 
Last edited:
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 June 26, 2025 12:45 am ET a total of USDA confirmed + highly probable herds via states = 1,079​


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

California= 767: 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
 
Last edited:
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 July 23, 2025 7:50pm ET a total of USDA confirmed + highly probable herds via states = 1,082​


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

California= 770: 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
 
Last edited:
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
 
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
 
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
 
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
 
Last edited:
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 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[/QUOTE]
 
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
 
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
 
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 April 13, 2026 9:18 pm ET - a total of USDA confirmed + highly probable herds via states = 1,142​


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 = 114: 113 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
 
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 May 13, 2026 1:55 pm ET - a total of USDA confirmed + highly probable herds via states = 1,160​


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

California= 822: 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 = 131: 130 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., 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[/QUOTE]
 
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 May 27, 2026 11:25 pm ET - a total of USDA confirmed + highly probable herds via states = 1,161​


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

California= 822: 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 = 132: 131 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., 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
 
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