California
Equine Disease Alerts
Risk Assessment
Risk Level
🟠 Elevated
Multiple cases - enhanced biosecurity recommended
Cases (30 days)
7
Total Cases
209
Total Alerts
97
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
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
EIA
91
WNV
16
Strangles
2
EHV-1 Neuro
2
Apr
May
Jun
Jul
Aug
Sep
EIA
WNV
Strangles
EHV-1 Neuro
LessMore
💡
Equine Infectious Anemia shows peak activity in spring (Apr-Jun) with 59% 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
West Nile Virusactive
Amador
1 cases
Sep 17, 2026
West Nile Virusactive
Shasta
1 cases
Sep 16, 2026
West Nile Virusactive
El Dorado
1 cases
Sep 14, 2026
West Nile Virusactive
Amador
1 cases
Sep 11, 2026
Equine Infectious Anemiaofficial quarantine
San Benito
1 cases
Sep 11, 2026
West Nile Virusactive
Sutter
1 cases
Sep 5, 2026
West Nile Virusactive
Sacramento
1 cases
Sep 5, 2026
Equine Infectious Anemiaofficial quarantine
Santa Clara
6 cases
Aug 28, 2026
West Nile Virusactive
Contra Costa
1 cases
Aug 28, 2026
Equine Infectious Anemiaactive
Stanislaus
16 cases
Aug 26, 2026
West Nile Virusactive
Stanislaus
1 cases
Aug 25, 2026
Stranglesvoluntary quarantine
Sonoma
Boarding Facility
1 cases
Aug 17, 2026
West Nile Virusactive
Fresno
1 cases
Aug 17, 2026
West Nile Virusactive
Placer
1 cases
Aug 10, 2026
West Nile Virusactive
Merced
1 cases
Aug 6, 2026
West Nile Virusactive
Kings
1 cases
Jul 31, 2026
West Nile Virusactive
Sacramento
1 cases
Jul 29, 2026
Equine Infectious Anemiaofficial quarantine
Riverside
2 cases
Jul 28, 2026
Equine Infectious Anemiaofficial quarantine
San Bernardino
6 cases
Jul 28, 2026
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 Bernardino
1 cases
May 1, 2026
Equine Infectious Anemiaofficial quarantine
San Joaquin
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