While there have been new premises affected by vesicular stomatitis virus (VSV) virus since the last report on June 24, there have been no new VSV-positive states identified. VSV-affected states for the 2020 outbreak include Arizona, Kansas, Nebraska, New Mexico and Texas.
Since the last situation report on June 24, there have been 30 new VSV-affected premises identified (18 confirmed positive, 12 suspect) in 2 states. Updates are as follows:
Arizona (1 new confirmed positive premises)
- Maricopa County – 1 new confirmed positive equine premises
- Since the last situation report, 3 previously VSV-infected or suspect premises have been released from quarantine in Maricopa County.
Kansas (17 new confirmed positive, 12 new suspect premises)
- Butler County – 9 new confirmed positive, 10 new suspect premises (all equine)
- Cowley County – 1 new confirmed positive equine premises
- Greenwood County (New Infected County) – 1 confirmed positive equine premises
- Marion County (New Infected County) – 1 confirmed positive equine premises
- Sedgwick County – 3 new confirmed positive equine premises
- Sumner County (New Infected County) – 2 confirmed positive, 2 suspect premises (all equine)
- The following previously VSV-infected or suspect premises have been released from quarantine: 5 in Butler County, 1 in Cowley County, and 1 in Sedgwick 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, Texas, Kansas and Nebraska subsequently broke with VSV cases that were confirmed by NVSL on April 22, 2020 (Cochise County, Arizona), April 23, 2020 (Starr County, Texas), June 16, 2020 (Butler County, Kansas), and June 24, 2020 (Buffalo County, Nebraska).
Since the start of the outbreak, 107 VSV-affected premises have been identified (81 confirmed positive, 26 suspect). One hundred three (103) of these premises had only equine species clinically affected and 4 premises had clinically affected cattle (McMullen, Starr, and Zapata Counties, Texas).
Arizona has identified 19 affected premises (18 confirmed positive, 1 suspect) in 7 counties (Apache, Cochise, Gila, Maricopa, Pima, Pinal, and Santa Cruz Counties).
Kansas has identified 61 affected premises (39 confirmed positive, 22 suspect) in 6 counties (Butler, Cowley, Greenwood, Marion, Sedgwick, and Sumner Counties).
Nebraska has identified 1 affected premises in 1 county (Buffalo County). 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 51 previously VSV-infected or suspect premises that have completed the quarantine period and been released. The last VSV-quarantined premises was released in New Mexico on June 4, 2020, and in Texas on June 8, 2020.
Fifty-six (56) premises remain under VSV quarantine in Arizona, Kansas and Nebraska.