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Outbreak

Outbreak Alerts: December 24, 2025 – Equine Herpesvirus- Neurologic in Eddy & Dona Ana Counties, NM

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Equine Rhinitis Virus-B

Confirmed Case(s) – Quarantine Released Source: State Veterinarian Eddy County: Number Confirmed: 2; Number Exposed: 3; Comments: All of our hold orders were released around 12/7 to 12/10. Our last quarantine was released on 12/21. As of right now, we have no active cases.; Previous Alerts: 4743 Dona Ana County: Number Confirmed: 1; Number Exposed: 2; Comments: All of our hold orders …

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Outbreak Alerts: December 23, 2025 – Equine Herpesvirus- Neurologic in Larimer County, CO

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Equine Rhinitis Virus-B

Confirmed Case(s) – Quarantine Released Source: State Veterinarian’s Office Number Confirmed: 1; Number Exposed: Unknown; Comments: Notice of quarantine release; Previous Alerts: 4730, 4723 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 CenterUpdates on current disease outbreaks are listed on our EDCC website as they occur and will include the date listed, disease …

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Outbreak Alerts: December 19, 2025 – Equine Herpesvirus- Neurologic in Bowie County, TX

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: Private Practitioner and State Animal Health Official Number Confirmed: 1; Number Suspected: Unknown; Number Exposed: Unknown;  Horse 1: Breed: Donkey; Clinical Signs: The donkey was recently acquired from Bowie Livestock Sale. The donkey subsequently developed neurologic signs and was transferred to a referral hospital for care on 12/17/25.; This case is not associated …

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Outbreak Alerts: December 11, 2025 – 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 (11/26/2025), there has been one (1) new confirmed positive equine premises identified in Arizona (Maricopa County – new affected county). All confirmed cases in the 2025 outbreak have …

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Outbreak Alerts: November 30, 2025 – Equine Herpesvirus- Neurologic in Pinal County, AZ

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Equine Rhinitis Virus-B

Confirmed Case(s) – Official Quarantine Source: Arizona Department of Agriculture Number Confirmed: 1Number Exposed: 8Number Euthanized: 1Facility Type: Private FacilityComments: No known direct exposure or epidemiologic link to any of the previously reported quarantined premises in Arizona nor any of the known exposure events in Texas or Oklahoma. For more information go to: https://www.equinediseasecc.org/equine-herpesvirus See past …

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Outbreak Alerts: Nov 25 – Dec 04, 2025 – Equine Herpesvirus – Neurologic & Respiratory – MULTIPLE COUNTIES, TEXAS

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Equine Rhinitis Virus-B

Information Only Source: Texas Animal Health Commission Comments: To date 30 cases have been confirmed by the Texas Animal Health Commission with the last case confirmed Nov. 27, 2025. Five of the submitted cases died or were euthanized. Cases have been identified in the following counties: Montgomery, Lee, McLennan, Ellis, Wise, …

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Outbreak Alerts: November 26, 2025 – Vesicular Stomatitis – Santa Cruz 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 (11/24/2025), there has been one (1) new confirmed positive equine premises identified in Arizona (Santa Cruz County – new affected county). All confirmed cases in the 2025 …

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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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