Kansas Sees Four New Confirmed Cases of VSV
In its July 27 Situation Report, the USDA’s Animal and Plant Health Inspection Service (APHIS) confirmed Riley County, Kansas, as newly infected with vesicular stomatitis virus (VSV). One equine premises there was confirmed positive and quarantined.

Riley County joins six other counties with new confirmed positive or suspect cases of VSV, five of which involve equids:

  • Labette – 1 new suspect equine premises
  • Linn – 1 new confirmed positive equine premises
  • Marion – 1 new confirmed cattle premises
  • Miami – 1 new suspect equine premises
  • Montgomery – 1 new suspect equine premises
  • Neosho – 1 new confirmed positive and 1 new suspect equine premises

Kansas currently leads states in the number of counties (22) with VSV-quarantined premises. Counties with confirmed positive premises and currently quarantined premises include:

  • Allen (3, 7)
  • Bourbon (1, 1)
  • Butler (31, 4)
  • Chase (1, 0)
  • Cherokee (6, 11)
  • Coffey (1, 3)
  • Cowley (9, 5)
  • Elk (1, 1)
  • Greenwood (2, 1)
  • Labette (2, 5)
  • Linn (2, 3)
  • Lyon (3, 5)
  • Marion (2, 1)
  • Miami (2, 5)
  • Montgomery (6, 3)
  • Morris 1, 1)
  • Neosho (3, 12)
  • Riley (1, 1)
  • Sedgwick (11, 2)
  • Sumner (2, 2)
  • Wilson (3, 8)
  • Woodson (1, 1)

Since APHIS’ last Situation Report on July 23, the following previously infected or suspect premises have been released from quarantine:

  • Montgomery (8)
  • Sedgwick (1)

The 2020 VSV outbreak began April 13 in Dona Ana County, New Mexico. Kansas was first infected on June 16, in Butler County.

Premises with confirmed positive and suspect cases are quarantined and monitored by veterinarians for at least 14 days from the onset of lesions in the last animal affected.

VS 101

Vesicular stomatitis virus can cause blisters and sores in the mouth and on the tongue, muzzle, teats, or hooves of horses, cattle, swine, sheep, goats, llamas, and a number of other animals. Lesions usually heal in two or three weeks.

Because of the virus’ contagious nature and its resemblance to other diseases such as foot-and-mouth disease, animal health officials urge livestock owners and caretakers to report these symptoms to their veterinarian immediately. Most animals recover with supportive care by a veterinarian.

“Vesicular stomatitis has been confirmed only in the Western Hemisphere,” APHIS said on its website. “It is known to be an endemic disease in the warmer regions of North, Central, and South America, and outbreaks of the disease in other temperate geographic parts of the hemisphere occur sporadically. The Southwestern and Western United States have experienced a number of vesicular stomatitis outbreaks … Outbreaks usually occur during the warmer months, often along waterways.” According to Angela Pelzel McCluskey, DVM, APHIS’ equine epidemiologist, the largest VS outbreak in more than 40 years of recorded history occurred in 2019.

Some states and other countries might restrict movement of, or impose additional requirements for, susceptible animals from states having known VS cases. Before moving livestock, contact the state of destination for its requirements.