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Equine Disease Communication Center

Updates 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. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.  All information is sourced from:  http://equinediseasecc.org/alerts/outbreaks

Outbreak Alerts: November 20, 2025 – Equine Herpesvirus- Neurologic in Montgomery County, TX

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: Attending Veterinarian Number Confirmed: 2; Number Exposed: Unknown; Number Euthanized: 1; Facility Type: Private Facility;  Horse 1: Gender: Gelding; Breed: Quarter Horse (QH); Usage: Barrel Racing; Onset of Clinical Signs: 11/18/2025; Clinical Signs: Weak rear end Depression / Lethargy; Confirmation Date: 11/19/2025; Horse Status: Isolated; Vaccination Status: Status Unknown; Horse 2: Breed: Quarter Horse (QH); Clinical Signs: Neurologic signs; Horse Status: Euthanized;  Comments: Both cases are associated with the EHM outbreak that originated at …

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Outbreak Alerts: November 20, 2025 – Equine Herpesvirus- Respiratory – Larimer County, CO

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Equine Rhinitis Virus-B

Source: State Veterinarian Number Confirmed: 1; Number Exposed: 1; Facility Type: Private Facility;  Horse 1: Age: 13; Gender: Mare; Breed: Quarter Horse (QH); Usage: Barrel Racing; Onset of Clinical Signs: 11/18/2025; Clinical Signs: Febrile; Confirmation Date: 11/20/2025; Horse Status: Affected And Alive; Vaccination Status: Status Unknown; Comments: EHV-1 positive but no neurological signs. This horse was exposed to EHV at the event in Waco, TX. The horse spiked a mild fever after returning home …

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Outbreak Alerts: November 19, 2025 – Equine Herpesvirus- Neurologic in McLennan County, TX

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: Texas Animal Health Commission Number Confirmed: 2; Comments: For more information, about EHM cases in Oklahoma and Texas tied to the Women’s Professional Rodeo Association (WPRA) World Finals and Elite Barrel Race event held Nov. 5-9 in Waco, Texas, and the cancellation of the Barrel Futurities of America …

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Outbreak Alerts: November 19, 2025 – Equine Herpesvirus- Neurologic in Logan County, OK

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: Oklahoma State Veterinarian Number Confirmed: 2; Comments: For more information, about EHM cases in Oklahoma and Texas tied to the Women’s Professional Rodeo Association (WPRA) World Finals and Elite Barrel Race event held Nov. 5-9 in Waco, Texas, and the cancellation of the Barrel Futurities of America (BFA) …

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Outbreak Alerts: November 18, 2025 – West Nile Virus – Kiowa & Carter and Love Counties, OK

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Equine Rhinitis Virus-B

Kiowa County, OK Source: State Veterinarian Confirmed Case(s) – No Quarantine Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown; Facility Type: Private Facility;  Horse 1: Age: 5; Gender: Mare; Breed: Appaloosa; Usage: Breeding; Onset of Clinical Signs: 10/20/2025; Clinical Signs: Ataxia, loss of balance, falling forward; Confirmation Date: 11/4/2025; Horse Status: Unknown; Vaccination Status: Unvaccinated;   Carter and Love County, OK Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown;  Horse 1: Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Ranch work; Onset of Clinical Signs: 10/16/2025; Clinical Signs: Anxiety, …

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Outbreak Alerts: November 03, 2025 – Vesicular Stomatitis – Cochise County, AZ

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Equine Rhinitis Virus-B

Source: Arizona Department of Agriculture and United States Department of Agriculture Animal and Plant Health Inspection Service Confirmed Case(s) – Official Quarantine Number Confirmed: 2Number Exposed: 60Facility Type: Private FacilityComments: On October 31, 2025, the National Veterinary Services Laboratories in Ames, Iowa, confirmed findings of vesicular stomatitis New Jersey virus (VSNJV) in horses on …

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Outbreak Alerts: November 01, 2025 – West Nile Virus – Brazos County, TX

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Equine Rhinitis Virus-B

Source: Attending Veterinarian Confirmed Case(s) – No Quarantine Number Confirmed: 2Number Suspected: UnknownNumber Exposed: UnknownFacility Type: Veterinary HospitalComments: Two independent cases; not located on the same farm. For more information about West Nile Virus go to: WNV factsheet.  See past published Outbreak Alerts: www.coloradohorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on our …

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Outbreak Alerts: October 29, 2025 – West Nile Virus – Weld County, CO

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Equine Rhinitis Virus-B

Source: State Veterinarian’s Office Number Confirmed: 1Number Exposed: Unknown Facility Type: Private Facility Horse 1: Age: 3; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 10/21/2025; Clinical Signs: Ataxia Fasciculation; Confirmation Date: 10/29/2025; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated; For more information about West Nile Virus go to: WNV factsheet.  See past published Outbreak Alerts: www.coloradohorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on …

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Outbreak Alerts: October 16, 2025 – 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 Williamson County, TX Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown; Number Euthanized: 1; Comments: Additional to Alert 4467 case. Quarantined 7/16/25. Quarantines will not be released until TAHC’s requirements are met. TAHC staff work closely with the owners and local veterinarians to monitor potentially …

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Outbreak Alerts: September 30, 2025 – West Nile Virus – Mesa County, CO

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Equine Rhinitis Virus-B

Source: State Veterinarian’s Office Number Confirmed: 1; Number Exposed: 7; Facility Type: Private Facility;  Horse 1: Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Pleasure Riding; Onset of Clinical Signs: 9/13/2025; Clinical Signs: Weakness Ataxia Fasciculation; Confirmation Date: 9/29/2025; Horse Status: Recovering; Vaccination Status: Undervaccinated; For more information about West Nile Virus go to: WNV factsheet.  See past published Outbreak Alerts: www.coloradohorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on …

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