Breaking News
National Equine Health Stakeholder Call-July 2024
Learn More

Disease Alerts

Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.

San Diego County and Riverside County, CA
Outbreak Identifier: 5620
Alert ID: 3034
May 26, 2023
Confirmed Case(s) - Official Quarantine


Comments: Since the last situation report (5/22/2023), there have been 7 new VSV-affected premises identified (0 confirmed positive, 7 suspect) in two counties (San Diego and Riverside Counties) in California. To date, all confirmed cases have been vesicular stomatitis New Jersey virus (VSNJV) serotype. Updates are as follows: California • Riverside County – 2 new suspect equine premises • San Diego County – 4 new suspect equine premises and 1 suspect bovine premises (1 backyard beef steer with lesions out of 3 cattle on the premises); 1 equine premises previously reported as suspect has been reclassified as confirmed VSV-positive • Since the last situation report (5/22/2023), the following previously VSV-suspect or confirmed positive premises have been released from quarantine: 2 premises in Riverside County and 1 premises in San Diego County. Since the start of the outbreak, 26 VSV-affected premises have been identified (9 confirmed positive, 17 suspect) in 1 state, California.  Twenty-five (25) of these premises have had only equine species clinically affected in 2 counties (Riverside and San Diego Counties) and one (1) premises has had clinically affected cattle (San Diego County).

For more information go to--
Previous Alerts: 3029