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Outbreak Alert

Outbreak Alerts: March 08, 2026 – Equine Herpesvirus- Respiratory – Maricopa County, AZ

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Equine Rhinitis Virus-B

Source: Arizona Department of Agriculture Exposed Horses – Official Quarantine Number Confirmed: 1; Number Exposed: 32; Facility Type: Private Facility; See past published Outbreak Alerts: www.coloradohorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on our EDCC website as they occur and will include the date listed, disease name, location and current status. …

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Outbreak Alert: March 06, 2026 – Equine Influenza in Gallatin County, MT

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Equine Rhinitis Virus-B

Confirmed Case(s) – Voluntary Quarantine Source: Attending Veterinarian Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown; For more information about Equine Influenza, go to https://www.equinediseasecc.org/equine-influenza See past published Outbreak Alerts: www.coloradohorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on our EDCC website as they occur and will include the date listed, disease name, location and …

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Outbreak Alert: February 23, 2026 – Equine Influenza in Laramie County, WY

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Equine Rhinitis Virus-B

Confirmed Case(s) – No Quarantine Source: State Veterinarian Number Confirmed: 3; Facility Type: Farm; For more information about Equine Influenza, go to https://www.equinediseasecc.org/equine-influenza See past published Outbreak Alerts: www.coloradohorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on our EDCC website as they occur and will include the date listed, disease name, location and current …

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Outbreak Alerts: February 23, 2026 – Equine Infectious Anemia – MULTIPLE COUNTIES, Texas

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Equine Rhinitis Virus-B

Source: Texas Animal Health Commission Confirmed Case(s) – Official Quarantine Source: Texas Animal Health Commission Austin County, TX Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown; Number Euthanized: 1; Comments: Quarantined 1/27/26. Quarantines will not be released until TAHC’s requirements are met. TAHC staff work closely with the owners and local veterinarians to monitor potentially exposed horses and implement biosecurity …

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Outbreak Alerts: February 19, 2026 – Equine Infectious Anemia – Weld County, CO

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Equine Rhinitis Virus-B

Source: State Veterinarian’s Office Confirmed Case(s) – Official Quarantine Number Confirmed: 1; Number Exposed: 2; Facility Type: Private Facility;  Horse 1: Age: 7; Gender: Mare; Breed: Quarter Horse (QH); Usage: Racing; Clinical Signs: Tested due to exposure to initial Adams County, CO case in December.; Confirmation Date: 2/17/2026; Horse Status: Affected And Alive; For more information:  https://www.equinediseasecc.org/equine-infectious-anemia See past published Outbreak Alerts: www.coloradohorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current …

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Outbreak Alerts: February 19, 2026 – Vesicular Stomatitis – Maricopa County, AZ

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Equine Rhinitis Virus-B

Source: United States Department of Agriculture Animal and Plant Health Inspection Service Confirmed Case(s) – Official Quarantine Comments: Since the last situation report (1/27/2026), there has been one (1) new confirmed VSV positive equine premises identified in Arizona (Maricopa County). All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis …

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Outbreak Alerts: February 05, 2026 – Equine Infectious Anemia – Nye County, NV

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Equine Rhinitis Virus-B

Source: State Department of Agriculture Confirmed Case(s) – Official Quarantine Number Confirmed: 1; Number Exposed: 12; Number Euthanized: 1; Facility Type: Training Facility; Comments: Testing of exposed horses on premises is pending; Previous Alerts: 4865 For more information:  https://www.equinediseasecc.org/equine-infectious-anemia See past published Outbreak Alerts: www.coloradohorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on our EDCC website as they …

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Outbreak Alerts: January 29 & 30, 2026 – Equine Infectious Anemia – MULTIPLE COUNTIES, Texas

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Equine Rhinitis Virus-B

Source: Texas Animal Health Commission Confirmed Case(s) – Official Quarantine Source: Texas Animal Health Commission Wichita County, TX Number Confirmed: 3; Horse 1: Breed: Quarter Horse (QH); Confirmation Date: 1/21/2026; Comments: After regulatory testing was performed to meet TAHC requirements, the horses were confirmed EIA positive. The premises has been quarantined and will not be released until the TAHC’s requirements …

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Outbreak Alerts: January 27, 2026 – Vesicular Stomatitis – Maricopa County, AZ

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Equine Rhinitis Virus-B

Source: United States Department of Agriculture Animal and Plant Health Inspection Service Confirmed Case(s) – Official Quarantine Comments: Since the last situation report (1/9/2026), there has been one (1) new confirmed VSV positive equine premises identified in Arizona (Maricopa County). All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis New …

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Outbreak Alerts: January 12, 2026 – Equine Infectious Anemia – Adams County, CO

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Equine Rhinitis Virus-B

Source: State Veterinarian’s Office Confirmed Case(s) – Official Quarantine Number Confirmed: 3; Number Exposed: 11; Number Euthanized: 3;  Horse 1: Age: 5; Gender: Mare; Breed: Quarter Horse (QH); Usage: Racing; Onset of Clinical Signs: 12/16/2025; Clinical Signs: tested dur to exposure of another positive horse on the premises.; Confirmation Date: 12/23/2025; Horse Status: Euthanized;  Horse 2: Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Horse Status: Euthanized;  Horse 3: Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Onset of Clinical Signs: 12/16/2025; Clinical Signs: tested due to exposure to …

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