California
Equine Disease Alerts
Risk Assessment
Risk Level
🟠 Elevated
Multiple cases - enhanced biosecurity recommended
Cases (30 days)
6
Total Cases
164
Total Alerts
78
Track a specific disease in California
Detailed activity, alerts, and risk for each disease reported here.
Disease Activity in California
Weekly case intensity by disease - Hover for details
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
EIA
61
WNV
7
Strangles
4
EHV-1
2
EHV-1 Neuro
2
Feb
Mar
Apr
May
Jun
Jul
EIA
WNV
Strangles
EHV-1
EHV-1 Neuro
LessMore
💡
Equine Infectious Anemia shows peak activity in spring (Apr-Jun) with 89% of cases occurring during this period.
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Equine Health Resources
Official contacts and requirements for California
🩺State Veterinarian
🚨Report a Disease
📋Coggins Requirements
Coggins test required within 12 months for equines entering California. Required for change of ownership and all public events.
🔗Additional Resources
California Department of Food and Agriculture
Visit Website →California State Horsemen's Association
Visit Website →Get free outbreak alerts for California
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Recent Alerts in California
Equine Infectious Anemiaofficial quarantine
Santa Clara
6 cases
Jun 29, 2026
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
Merced
1 cases
Mar 20, 2026
Equine Infectious Anemiaofficial quarantine
Stanislaus
2 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