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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 Luis Obispo, Santa Barbara, Ventura Counties, CA
Outbreak Identifier: 5645
Alert ID: 3152
August 08, 2023
Confirmed Case(s) - Official Quarantine

USDA

VSV Situation Report 8/8/2023

Since the last situation report (8/3/2023), there have been 8 new VSV-affected equine premises identified (3 confirmed positive, 5 suspect) in California and Texas, including a new affected county, Shackelford County, Texas.  All confirmed cases have been vesicular stomatitis New Jersey virus (VSNJV) serotype. Updates are as follows:  

California

  • San Luis Obispo County – 1 new suspect equine premises
  • Santa Barbara County – 1 new confirmed positive equine premises
  • Ventura County – 1 new confirmed positive and 4 new suspect equine premises
  • Additionally, 1 equine premises previously reported as suspect in Ventura County has been reclassified as confirmed positive.   
  • Since the last situation report (8/3/2023), the following previously confirmed positive or suspect premises have been released from quarantine: 1 premises in Los Angeles County and 4 premises in Ventura County.

Nevada

  • No new confirmed positive premises have been identified.  

Texas

  • Shackelford County (New Infected County) – 1 confirmed positive equine premises

Since the start of the outbreak (5/17/2023), 177 VSV-affected premises have been identified (62 confirmed positive, 115 suspect) in 3 states, California, Nevada, and Texas.  One hundred seventy-four (174) of these premises have had only equine species clinically affected, two (2) premises have had clinically affected cattle (San Diego County, California), and one (1) premises has had clinically affected rhinoceros (San Diego County, California). 

California has identified 174 affected premises (59 confirmed positive, 115 suspect) in 8 counties (Los Angeles, Orange, Riverside, San Bernardino, San Diego, San Luis Obispo, Santa Barbara, and Ventura Counties).  Texas has identified 2 affected premises (2 confirmed positive) in 2 counties (Maverick and Shackelford Counties).  Nevada has identified 1 affected premises (1 confirmed positive) in 1 county (White Pine County, Nevada).  

Of the 177 total VSV-affected premises, 105 premises have completed the quarantine period with no new clinical cases and have been released from quarantine.  Seventy-two (72) premises remain quarantined.  

Additional information and maps of the affected area are contained in the situation report which is posted publicly on the APHIS website and accessible at the following link:  https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-disease-information/equine/vsv/vesicular-stomatitis
Previous Alerts: 3145, 3126, 3115, 3111, 3099, 3090, 3085, 3071, 3066, 3060

Shackelford County, TX
Outbreak Identifier: 5645
Alert ID: 3152
August 08, 2023
Confirmed Case(s) - Official Quarantine

USDA

VSV Situation Report 8/8/2023

Since the last situation report (8/3/2023), there have been 8 new VSV-affected equine premises identified (3 confirmed positive, 5 suspect) in California and Texas, including a new affected county, Shackelford County, Texas.  All confirmed cases have been vesicular stomatitis New Jersey virus (VSNJV) serotype. Updates are as follows:  

California

  • San Luis Obispo County – 1 new suspect equine premises
  • Santa Barbara County – 1 new confirmed positive equine premises
  • Ventura County – 1 new confirmed positive and 4 new suspect equine premises
  • Additionally, 1 equine premises previously reported as suspect in Ventura County has been reclassified as confirmed positive.   
  • Since the last situation report (8/3/2023), the following previously confirmed positive or suspect premises have been released from quarantine: 1 premises in Los Angeles County and 4 premises in Ventura County.

Nevada

  • No new confirmed positive premises have been identified.  

Texas

  • Shackelford County (New Infected County) – 1 confirmed positive equine premises

Since the start of the outbreak (5/17/2023), 177 VSV-affected premises have been identified (62 confirmed positive, 115 suspect) in 3 states, California, Nevada, and Texas.  One hundred seventy-four (174) of these premises have had only equine species clinically affected, two (2) premises have had clinically affected cattle (San Diego County, California), and one (1) premises has had clinically affected rhinoceros (San Diego County, California). 

California has identified 174 affected premises (59 confirmed positive, 115 suspect) in 8 counties (Los Angeles, Orange, Riverside, San Bernardino, San Diego, San Luis Obispo, Santa Barbara, and Ventura Counties).  Texas has identified 2 affected premises (2 confirmed positive) in 2 counties (Maverick and Shackelford Counties).  Nevada has identified 1 affected premises (1 confirmed positive) in 1 county (White Pine County, Nevada).  

Of the 177 total VSV-affected premises, 105 premises have completed the quarantine period with no new clinical cases and have been released from quarantine.  Seventy-two (72) premises remain quarantined.  

Additional information and maps of the affected area are contained in the situation report which is posted publicly on the APHIS website and accessible at the following link:  https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-disease-information/equine/vsv/vesicular-stomatitis
Previous Alerts: 3145, 3126, 3115, 3111, 3099, 3090, 3085, 3071, 3066, 3060