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Outbreak Alerts: November 18, 2025 – Equine Infectious Anemia in Riverside County, CA

Equine Herpesvirus- Neurologic

Confirmed Case(s) – Quarantine Released Source: California Department of Food and Agriculture Number Confirmed: 1; Number Exposed: 1; Number Euthanized: 1;  Horse 1: Age: 13; Gender: Gelding; Breed: Quarter Horse (QH); Horse Status: Euthanized;  Comments: A confirmed EIA positive equid must be euthanized or quarantined for life 200 yards away from any EIA negative equid as per USDA EIA program rules. Euthanasia was elected … Read More

Outbreak Alert: August 26, 2025 – Equine Infectious Anemia in Riverside County, CA

Equine Herpesvirus- Neurologic

Confirmed Case(s) – Official Quarantine Source: California Department of Food and Agriculture Number Confirmed: 1Number Exposed: 1  Horse 1: Age: 13; Gender: Gelding; Breed: Quarter Horse (QH);  Comments: A 13–year–old Quarter Horse gelding in Riverside County was confirmed positive for Equine Infectious Anemia (EIA). One (1) potentially exposed horse on the home premises has initially tested negative for EIA … Read More

Outbreak Alert: March 25, 2025 – Equine Infectious Anemia in San Bernardino County, CA

Equine Herpesvirus- Neurologic

Confirmed Case(s) – Official Quarantine Source: California Department of Food and Agriculture Number Confirmed: 1Number Exposed: 2 Horse 1: Age: 7; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing;  Comments: A 7–year–old Quarter Horse gelding in San Bernardino County was confirmed positive for Equine Infectious Anemia (EIA). Two (2) potentially exposed horses on the home premises have been tested for EIA … Read More

Outbreak Alert: March 21, 2025 – Equine Infectious Anemia in San Joaquin County, CA

Equine Herpesvirus- Neurologic

Confirmed Case(s) – Official Quarantine Source: California Department of Food and Agriculture Number Confirmed: 1Number Exposed: 18Number Euthanized: 1 Horse 1: Age: 10Gender: GeldingBreed: Quarter Horse (QH)Horse Status: EuthanizedComments: A 10–year–old Quarter Horse gelding in San Bernardino County was confirmed positive for Equine Infectious Anemia (EIA). A confirmed EIA positive equid must be euthanized or quarantined for life 200 … Read More

Outbreak Alert: January 28, 2025 – Equine Infectious Anemia in San Bernardino County, CA

Equine Herpesvirus- Neurologic

Confirmed Case(s) – Official Quarantine Source: California Department of Food and Agriculture Number Confirmed: 1Number Exposed: 18Number Euthanized: 1 Horse 1: Age: 10Gender: GeldingBreed: Quarter Horse (QH)Horse Status: EuthanizedComments: A 10–year–old Quarter Horse gelding in San Bernardino County was confirmed positive for Equine Infectious Anemia (EIA). A confirmed EIA positive equid must be euthanized or quarantined for life 200 … Read More

Outbreak Alert: November 21, 2024 – Equine Infectious Anemia in Orange County, CA

Equine Herpesvirus- Neurologic

**Quarantine Released** Source: CDFA Number Exposed: 6Comments: November 19, 2024: The population of horses that were considered close contact potentially exposed on the Orange County premises have remained under quarantine during the ongoing USDA and CDFA investigation into this case. USDA has been handling the multistate aspect of this investigation and based on … Read More

Outbreak Alert: March 28, 2023 – Equine Infectious Anemia in Los Angeles County, CA

Equine Herpesvirus- Neurologic

Source: California Department of Food and Agriculture Number Confirmed: 2Number Exposed: 10Number Euthanized: 2 Horse 1: Age: 4Gender: GeldingBreed: Quarter Horse (QH)Usage: RacingHorse Status: Euthanized;  Horse 2: Age: 8Gender: GeldingBreed: Quarter Horse (QH)Usage: RacingConfirmation Date: 3/20/2024Horse Status: Euthanized Comments: A 4–year–old Quarter Horse gelding and an 8–year–old Quarter Horse gelding in Los Angeles County were confirmed positive for Equine Infectious Anemia (EIA). A confirmed EIA positive equid … Read More

Outbreak Alert: March 28, 2023 – Equine Infectious Anemia in Riverside County, CA

Equine Herpesvirus- Neurologic

Source: California Department of Food and Agriculture Number Confirmed: 4Number Exposed: 21Number Euthanized: 4 Horse: 1Age: 2Gender: GeldingBreed: Quarter Horse (QH)Usage: RacingConfirmation Date: 1/2/2024Horse Status: EuthanizedComments: One of the twenty-two (22) remaining exposed horses tested positive for EIA on the sixty (60) day retest. This two-year-old Quarter Horse gelding was euthanized. The remaining … Read More

Outbreak Alert: July 28, 2023 – Equine Infectious Anemia in Cariboo, BC

Equine Herpesvirus- Neurologic

Source: Canadian Food Inspection Agency Confirmed Case(s) – Official Quarantine Number Confirmed: 3Number Suspected: UnknownNumber Exposed: UnknownComments: On July 19, 2023, positive equine infectious anemia (EIA) results were confirmed by the Canadian Food Inspection Agency’s (CFIA) national reference laboratory for three horses located on a premises in Cariboo Subdivision C, British Columbia. The … Read More

Outbreak Alert: July 11, 2023 – Equine Infectious Anemia in Cariboo, BC

Equine Herpesvirus- Neurologic

Source: Canadian Food Inspection Agency Confirmed Case(s) – Official Quarantine Number Confirmed: 1Number Suspected: UnknownNumber Exposed: UnknownComments: On July 7, 2023, positive equine infectious anemia (EIA) results were confirmed by the Canadian Food Inspection Agency’s (CFIA) national reference laboratory for a horse located on a premises in Cariboo Subdivision C, British Columbia. The horse … Read More

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