Vesicular Stomatitis Virus Update August 23

Since August 19, there have been 43 new VSV-affected premises identified.

Counties affected by vesicular stomatitis virus as of August 23, 2019. USDA APHIS

Since the last situation report (August 19, 2019), there have been 43 new VSV-affected premises (14 confirmed positive, 29 suspect) identified:

Colorado (10 new confirmed positive premises, 26 new suspect premises)

  • Adams County – 1 new suspect premises
  • Boulder County – 1 new suspect premises
  • Chaffee County (new infected county) – 2 confirmed positive premises
  • Delta County – 4 new suspect premises
  • Douglas County – 1 new suspect premises
  • Fremont County (new infected county) – 1 confirmed positive premisesJefferson County – 5 new confirmed positive, 2 new suspect premises
  • Larimer County – 2 new suspect premises
  • Mesa County – 1 new confirmed positive, 7 new suspect premises
  • Montezuma County – 1 new suspect premises
  • Montrose County – 5 new suspect premises
  • Park County (new infected county) – 1 confirmed positive premises
  • Weld County – 2 new suspect premises

Since the last situation report, 64 previously VSV-infected or suspect premises have been released from quarantine.

Nebraska (1 new confirmed positive premises)

  • Dawes County (new infected county) – 1 confirmed positive premises

Since the last situation report, 1 previously VSV-infected premises was released from quarantine in Lincoln County.

Texas (2 new confirmed positive premises, 1 new suspect premises)

  • Collin County – 1 new confirmed positive premises
  • Ellis County (New Infected County) – 1 confirmed positive premises
  • Williamson County – 1 new suspect premises

Since the last situation report, 30 previously VSV-infected or suspect premises have been released from quarantine.

Utah (1 new suspect premises)

• Uintah County – 1 new suspect premises

Wyoming (1 new confirmed positive premises, 1 new suspect premises)

  • Hot Springs County (new infected county) – 1 confirmed positive premises
  • Platte County – 1 new suspect premises

Since the last situation report, 7 previously VSV-infected or suspect premises have been released from quarantine.

Summary of the Outbreak

The 2019 VSV outbreak began on June 21, 2019, when the National Veterinary Services Laboratories (NVSL) in Ames, Iowa, confirmed the first VSV-positive premises in Kinney County, Texas. New Mexico, Colorado, Wyoming, Oklahoma, Nebraska and Utah subsequently broke with cases which were confirmed by NVSL on June 26, 2019 (Sandoval County, New Mexico), July 3, 2019 (Weld County, Colorado), July 24, 2019 (Platte County, Wyoming), July 29, 2019 (Tillman County, Oklahoma), August 9, 2019 (Lincoln County, Nebraska), and August 19, 2019 (Emery and Uintah Counties, Utah). 

Since the start of the outbreak, 851 VSV-affected premises have been identified (353 confirmed positive, 498 suspect). Eight hundred forty-eight (848) of these premises have only equine species clinically affected and 3 premises have affected cattle (Boulder and Delta Counties, Colorado, and Gonzales County, Texas). 

Colorado has identified 580 affected premises (219 confirmed positive, 361 suspect) in 26 counties (Adams, Alamosa, Arapahoe, Archuleta, Boulder, Broomfield, Chaffee, Conejos, Delta, Douglas, Fremont, Gilpin, Grand, Gunnison, Jefferson, La Plata, Larimer, Mesa, Mineral, Montezuma, Montrose, Morgan, Ouray, Park, Pueblo and Weld Counties). 

Nebraska has identified 4 affected premises in 3 counties (Dawes, Lincoln, and Scottsbluff Counties). 

New Mexico has identified 74 affected premises (47 confirmed positive, 27 suspect) in 12 counties (Cibola, Los Alamos, Mora, Rio Arriba, Sandoval, San Juan, San Miguel, Santa Fe, Sierra, Socorro, Taos and Valencia Counties). 

Oklahoma has identified 1 affected premises in 1 county (Tillman County). 

Texas has identified 161 affected premises (69 confirmed positive, 92 suspect) located in 36 counties (Bastrop, Bell, Bosque, Brown, Caldwell, Coleman, Collin, Coryell, Dallas, Eastland, Ellis, Erath, Falls, Gonzales, Guadalupe, Haskell, Hays, Hood, Johnson, Kerr, Kinney, Lampasas, Mason, McLennan, Mills, Palo Pinto, Parker, San Saba, Shackelford, Somervell, Taylor, Tom Green, Travis, Val Verde, Wichita and Williamson Counties). 

Utah has identified 4 affected premises in 2 counties (Emery and Uintah Counties). 

Wyoming has identified 27 affected premises (10 confirmed positive, 17 suspect) in 6 counties (Albany, Converse, Hot Springs, Laramie, Platte and Sweetwater Counties). 

There have been a total of 554 previously VSV-infected or suspect premises that have completed the quarantine period and been released.

Editor’s note: Don’t miss the Disease Du Jour podcast from USDA APHIS Veterinary Services practitioner Dr. Angela Pelzel-McCluskey to learn more about vesicular stomatitis virus.

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