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Outbreak Alert

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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Important Equine Health Alert: EHV/EHM Information for Colorado

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EHV/EHM

Dear Colorado horse community, The Colorado State Veterinarian’s Office is monitoring an outbreak of Equine Herpes Virus (EHV) / Equine Herpes Myeloencephalopathy (EHM) associated with barrel racing and rodeo-type events in Texas and Oklahoma between November 5–9. Several cases, including equine deaths, have been confirmed in those states. At this time, there …

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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 Alert: November 21, 2025 – Equine Influenza in Lancaster County, NE

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Equine Rhinitis Virus-B

Confirmed Case(s) –  No Quarantine Source: Attending Veterinarian Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown; Facility Type: Boarding Facility;  Horse 1: Age: 16; Gender: Gelding; Breed: Morgan; Usage: Trail Riding; Onset of Clinical Signs: 11/7/2025; Clinical Signs: Snotty nose, cough; Confirmation Date: 11/13/2025; Horse Status: Recovering; Vaccination Status: Status 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 …

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