Equine Alerts

California

Equine Disease Alerts

Risk Assessment

Risk Level
🔴 High
Active outbreak activity - consult your vet
Cases (30 days)
18
Total Cases
158
Total Alerts
77

Neighboring States

ArizonaNevadaOregon

Track a specific disease in California

Detailed activity, alerts, and risk for each disease reported here.

Equine Herpesvirus-1 (EHV-1) in CaliforniaEquine Herpesvirus-1 Neurologic in CaliforniaEquine Infectious Anemia in CaliforniaStrangles in CaliforniaWest Nile Virus in California

Disease Activity in California

Weekly case intensity by disease - Hover for details

Jan
Feb
Mar
Apr
May
Jun
EIA
WNV
Strangles
EHV-1
EHV-1 Neuro
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More
💡

Equine Infectious Anemia shows peak activity in spring (Apr-Jun) with 88% of cases occurring during this period.

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Equine Health Resources

Official contacts and requirements for California

🩺State Veterinarian

Dr. Annette Jones

State Veterinarian

916-900-5000

cdfa.ahfss@cdfa.ca.gov

Official Website →

🚨Report a Disease

To report suspected equine diseases:

916-900-5002

Reportable Diseases Info →

📋Coggins Requirements

Coggins test required within 12 months for equines entering California. Required for change of ownership and all public events.

View Import Requirements →

🔗Additional Resources

California Department of Food and Agriculture

Visit Website →

California State Horsemen's Association

Visit Website →

Interstate Livestock

Find import requirements for all 50 states

Visit Website →

Get free outbreak alerts for California

We'll email you whenever a new equine disease outbreak is reported in California. Unsubscribe anytime.

Recent Alerts in California

Equine Infectious Anemiaactive

Stanislaus

16 cases
Jun 19, 2026
West Nile Virusactive

San Luis Obispo

1 cases
Jun 16, 2026
Equine Infectious Anemiaofficial quarantine

Fresno

1 cases
Jun 1, 2026
Equine Infectious Anemiaofficial quarantine

San Bernardino

6 cases
May 8, 2026
Equine Infectious Anemiaofficial quarantine

Riverside

2 cases
May 8, 2026
Equine Infectious Anemiaofficial quarantine

San Joaquin

1 cases
May 1, 2026
Equine Infectious Anemiaofficial quarantine

San Bernardino

1 cases
May 1, 2026
Equine Infectious Anemiaofficial quarantine

Santa Clara

1 cases
Apr 28, 2026
Equine Infectious Anemiaofficial quarantine

Santa Clara

0 cases
Apr 27, 2026
Equine Infectious Anemiaofficial quarantine

San Bernardino

1 cases
Apr 27, 2026
Equine Infectious Anemiaofficial quarantine

Santa Clara

1 cases
Apr 21, 2026
Equine Infectious Anemiaofficial quarantine

Riverside

1 cases
Apr 20, 2026
Equine Infectious Anemiaofficial quarantine

San Joaquin

1 cases
Apr 10, 2026
Equine Infectious Anemiaofficial quarantine

Fresno

1 cases
Apr 10, 2026
Equine Infectious Anemiaactive

Stanislaus

15 cases
Apr 7, 2026
Equine Herpesvirus-1 Neurologicofficial quarantine

Santa Barbara

1 cases
Mar 23, 2026
Equine Infectious Anemiaofficial quarantine

Stanislaus

2 cases
Mar 20, 2026
Equine Infectious Anemiaofficial quarantine

Merced

1 cases
Mar 20, 2026
Equine Herpesvirus-1 Neurologicofficial quarantine

Santa Barbara

1 cases
Mar 2, 2026
Equine Infectious Anemiaofficial quarantine

Riverside

1 cases
Feb 24, 2026
Equine Infectious Anemiaofficial quarantine

Merced

1 cases
Jan 20, 2026
Stranglesvoluntary quarantine

Los Angeles

Boarding Facility

1 cases
Dec 17, 2025
Equine Infectious Anemiaresolved

Riverside

1 cases
Nov 18, 2025
West Nile Virusactive

Sacramento

1 cases
Sep 30, 2025
West Nile Virusactive

Sacramento

1 cases
Sep 30, 2025
West Nile Virusactive

Yolo

1 cases
Sep 24, 2025
West Nile Virusactive

Stanislaus

1 cases
Sep 18, 2025
West Nile Virusactive

Contra Costa

1 cases
Sep 17, 2025
West Nile Virusactive

Santa Barbara

1 cases
Sep 2, 2025
Equine Herpesvirus-1 (EHV-1)active

Sacramento

2 cases
Aug 27, 2025
Equine Infectious Anemiaresolved

Riverside

1 cases
Aug 26, 2025
Stranglesvoluntary quarantine

Los Angeles

Boarding Facility

1 cases
Aug 16, 2025
Stranglesvoluntary quarantine

Los Angeles

Stable

2 cases
Aug 15, 2025
Equine Infectious Anemiaresolved

Madera

1 cases
Jul 3, 2025
Equine Infectious Anemiaresolved

San Bernardino

1 cases
Jun 25, 2025
Equine Herpesvirus-1 Neurologicresolved

Sonoma

1 cases
Jun 17, 2025
Equine Herpesvirus-1 Neurologicresolved

Los Angeles

6 cases
Jun 7, 2025
Equine Herpesvirus-1 Neurologicofficial quarantine

Sonoma

1 cases
Jun 4, 2025
Equine Infectious Anemiaresolved

San Joaquin

2 cases
Jun 2, 2025
Equine Herpesvirus-1 Neurologicresolved

Los Angeles

6 cases
May 21, 2025
Equine Herpesvirus-1 Neurologicresolved

Alameda

3 cases
May 16, 2025
Equine Herpesvirus-1 Neurologicresolved

Los Angeles

2 cases
May 16, 2025
Equine Infectious Anemiaresolved

Madera

1 cases
Apr 25, 2025
Equine Infectious Anemiaresolved

San Bernardino

1 cases
Apr 18, 2025
Equine Herpesvirus-1 Neurologicactive

Alameda

3 cases
Apr 10, 2025
Equine Herpesvirus-1 Neurologicactive

Alameda

2 cases
Apr 8, 2025
Equine Herpesvirus-1 Neurologicresolved

Santa Barbara

1 cases
Apr 4, 2025
Equine Herpesvirus-1 Neurologicresolved

Ventura

1 cases
Apr 3, 2025
Equine Herpesvirus-1 Neurologicactive

Alameda

1 cases
Apr 2, 2025
Equine Infectious Anemiaresolved

San Bernardino

1 cases
Apr 1, 2025