Arizona, New Mexico and Texas Report New VSV Premises

Seven new premises have been confirmed with vesicular stomatitis virus cases since May 14, marking continued spread of the disease.
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VSV quarantined premises 5-21-20

Counties marked in blue have active VSV quarantines in place.

Since the last situation report on May 14, there have been seven new vesicular stomatitis virus (VSV)-affected premises confirmed positive.

Updates are as follows.

Arizona (3 new confirmed positive premises) 

  • Cochise County – 2 new confirmed positive equine premises 
  • Santa Cruz County (New Infected County) – 1 confirmed positive equine premises 
  • Since the last situation report, 3 premises have been released from quarantine – 1 in Cochise County, 1 in Gila County, and 1 in Pima County. 

New Mexico (1 new confirmed positive) 

  • Dona Ana County – 1 new confirmed positive equine premises 
  • Since the last situation report, 2 premises have been released from quarantine in Dona Ana County. 

Texas (3 new confirmed positive premises) 

  • Hudspeth County (New Infected County) – 1 confirmed positive equine premises 
  • Kerr County (New Infected County) – 1 confirmed positive equine premises 
  • McMullen County (New Infected County) – 1 confirmed positive cattle premises 
  • Since the last situation report, 7 premises have been released from quarantine – 1 in El Paso County, 4 in Starr County, and 2 in Zapata County. 

Summary of the Outbreak

The 2020 VSV outbreak began on April 13, 2020, when the National Veterinary Services Laboratories (NVSL) in Ames, Iowa, confirmed the first VSV-positive premises in Dona Ana County, New Mexico. 

Arizona and Texas subsequently broke with VSV cases, which were confirmed by NVSL on April 22, 2020 (Cochise County, Arizona) and April 23, 2020 (Starr County, Texas). 

Since the start of the outbreak, 34 VSV-affected premises have been identified (31 confirmed positive, 3 suspect). 

Thirty of these premises had only equine species clinically affected, and four premises had clinically affected cattle (McMullen, Starr, and Zapata Counties, Texas). 

Arizona has identified eight affected premises (8 confirmed positive, 0 suspect) in five counties (Cochise, Gila, Pima, Pinal and Santa Cruz Counties). 

New Mexico has identified 16 affected premises (13 confirmed positive, 3 suspect) in 6 counties (Bernalillo, De Baca, Dona Ana, Eddy, Grant and Sierra Counties). 

Texas has identified 10 affected premises (10 confirmed positive, 0 suspect) in 6 counties (El Paso, Hudspeth, Kerr, McMullen, Starr and Zapata Counties). 

There have been a total of 21 previously VSV-infected or suspect premises that have completed the quarantine period and been released. Thirteen premises remain under VSV quarantine. 

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