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Outbreak

Outbreak Alerts: Nov 24 – Dec 04, 2025 – Equine Herpesvirus – Neurologic & Respiratory – MULTIPLE COUNTIES, Oklahoma

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Equine Rhinitis Virus-B

Source: Oklahoma State Veterinarian Love County, OK – Equine Herpesvirus- Neurologic Confirmed Case(s) – Official Quarantine Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown; Comments: Horse is from Texas, being treated in Oklahoma, and has been diagnosed with EHM. Horse attended the WPRA in Waco and the BFA in Guthrie. Horse was displaying mild neurological signs …

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Outbreak Alerts: November 25, 2025 – Equine Herpesvirus- Respiratory – Montgomery County, TX

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Equine Rhinitis Virus-B

Source: Attending Veterinarian Exposed Horses – Official Quarantine Number Confirmed: 1; Number Exposed: 30; Facility Type: Private Facility;  Horse 1: Age: 6; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Barrel Racing; Onset of Clinical Signs: 11/18/2025; Clinical Signs: Not Clinical. Primary exposed at WPRA in Waco. Tested positive on nasal swab and blood on In-House Fluxergy PCR; Confirmation Date: 11/18/2025; Horse Status: Affected And Alive; Vaccination Status: Status Unknown; This case is associated …

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Outbreak Alerts in MULTIPLE COUNTIES: November 25, 2025 – Equine Herpesvirus- Neurologic in Parker, Randall and Lee Counties, Texas

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Equine Rhinitis Virus-B

Parker County Confirmed Case(s) – Official Quarantine Source: Private Practitioner and State Animal Health Official Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown; Number Euthanized: 1; Facility Type: Private Facility;  Horse 1: Breed: Quarter Horse (QH); Onset of Clinical Signs: 11/21/2025; Horse Status: Euthanized;  Comments: This case is associated with the EHM outbreak that originated at the Women’s Professional Rodeo Association (WPRA) World Finals and …

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Outbreak Alerts: November 24, 2025 – Vesicular Stomatitis – Gila 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 Number Confirmed: 1; Comments: Since the last situation report (10/31/2025), there has been one (1) new confirmed positive equine premises identified in Arizona (Gila County – new affected county). All confirmed cases in the 2025 outbreak …

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Outbreak Alerts: November 22, 2025 – Equine Herpesvirus- Neurologic in Eddy County, NM

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: State Veterinarian Number Confirmed: 2; Number Exposed: 3; Comments: One horse traveled to Waco for WPRA; this horse tested PCR positive on both nasal swab and blood and has exhibited fever and neurologic symptoms. The second horse had not traveled but became ill as a result of exposure to …

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Outbreak Alerts: November 22, 2025 – 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: 3; Facility Type: Private Facility; Comments: Horse is nasal swab PCR positive for EHV-1 D752 but clinically normal, not febrile, no neurologic signs. This case is associated with the EHM outbreak that originated at the Women’s Professional Rodeo Association (WPRA) World Finals and …

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Outbreak Alerts: November 21, 2025 – Equine Herpesvirus- Neurologic in McLennan County, TX

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: Attending Veterinarian Number Suspected: Unknown; Number Exposed: Unknown; Facility Type: Veterinary Hospital; Comments: Hospitalized horse with consistent EHM signs with known exposure to Waco facility; For an up-to-date count of EHM cases tied to this outbreak, please visit HERE For more information go to: https://www.equinediseasecc.org/equine-herpesvirus See past published Outbreak Alerts: www.coloradohorsesource.com/category/news/alerts Equine Disease Communication …

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Outbreak Alerts: November 21, 2025 – Equine Herpesvirus- Neurologic in Hood County, TX

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: Private Practitioner Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown; Facility Type: Private Facility; Comments: This case is associated with the EHM outbreak that originated at the Women’s Professional Rodeo Association (WPRA) World Finals and Elite Barrel Race event; For an up-to-date count of EHM cases tied to this outbreak, please visit HERE For …

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Outbreak Alerts: November 21, 2025 – Equine Herpesvirus- Neurologic in Erath County, TX

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: Private Practitioner Number Confirmed: 1; Number Suspected: 1; Number Exposed: Unknown; Facility Type: Private Facility; Comments: This case is associated with the EHM outbreak that originated at the Women’s Professional Rodeo Association (WPRA) World Finals and Elite Barrel Race event; For an up-to-date count of EHM cases tied to this outbreak, please visit HERE For …

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Outbreak Alerts: November 21, 2025 – Equine Herpesvirus- Neurologic in Larimer County, CO

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: State Veterinarian’s Office Number Confirmed: 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 and now showing neurological signs; Confirmation Date: 11/20/2025; Horse Status: Affected And Alive; Vaccination Status: Status Unknown; Comments: Originally EHV-1 positive with no neurological signs but developed neurological signs overnight. This horse was exposed to …

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