Skip to content

EHV-1 Outbreak



This weekend's Tennessee Saturday Night horse show in Vancouver, WA has been CANCELLED due to the recent EHV-1 outbreak. Horse owners are advised to take precautionary measures to help stop the spread by keeping their horses home for the next 2 weeks. State departments of agriculture are providing updated information for their states and any travel advisories.
 
The American Association of Equine Practioners has released the following information:

URGENT RESPONSE INFORMATION AND RESOURCES
Currently, there are numerous reports of equine herpesvirus myeloencephalopathy (EHM) affecting horses and farms across the U.S. and Canada. This outbreak appears related to initial cases at a cutting horse show in Ogden Utah, which was held from April 29 - May 8. Horses at that event may have been exposed to this virus and subsequently spread the infection to other horses. While the true extent of this disease outbreak is uncertain, there is clearly a very significant elevated risk of EHM cases at this time.

At this time control of the outbreak is critically dependent on biosecurity. Laboratory submission of nasal swabs and whole blood samples collected from the exposed horse can be utilized for virus detection and isolation. Please consider testing any suspected cases. The EHV-1 organism spreads quickly from horse to horse but typically only causes neurological disease sporadically. However, in an outbreak of EHV-1 neurologic such as we are experiencing now, the disease can reach high morbidity and case fatality rates. The incubation period of EHV-1 infection is typically 1-2-days, with clinical signs of fever then occurring, often in a biphasic fever, over the following 10 days. When neurological disease occurs it is typically 8-12 days after the primary infection, starting often after the second fever spike. In horses infected with the neurologic strain of EHV-1, clinical signs may include: nasal discharge, incoordination, hind end weakness, recumbency, lethargy, urine dribbling and diminished tail tone. Prognosis depends on severity of signs and the period of recumbency.

There is no specific treatment for EHV-1, although antiviral drugs (i.e. valacyclovire) may have some value before neurological signs occur. Non-specific treatment may include intravenous fluids, and other appropriate supportive therapy; the use of anti-inflammatory drugs (NSAIDs) is strongly recommended. Currently, there is no equine vaccine that has a label claim for protection against the neurological strain of the virus. Horse-to-horse contact, aerosol transmission, and contaminated hands, equipment, tack, and feed all play a role in disease spread.

However, horses with severe clinical signs of neurological EHV-1 infection are thought to have large viral loads in their blood and nasal secretions and therefore, present the greatest danger for spreading the disease. Immediate separation and isolation of identified suspect cases and implementation of appropriate biosecurity measures are key elements for disease control. In order to assist you and your clients further, visit online here http://list.aaep.org/t/68400/2510/113322/0/ for Frequently Asked Questions, resource information from the AAEP, USDA, state and provincial animal health departments, and other related information regarding this outbreak and the disease.


 

More Stories

  • FAST provides industry update

    In 2021, the walking horse industry has experienced a generally successful year for our show horse including an increased number of horse shows and sustained entry numbers at the 2021 Celebration.  As we enter into the final quarter of the year, industry organizations and leadership are turning their attention toward the 2022 year.   Read More
  • Obituary – Lined With Cash

    It is with heavy hearts that we announce the passing of Lined With Cash. He passed this afternoon of an apparent cardiac arrest.  This 25-year-old son of WGC Coin's Hard Cash out of the great Gen's Silver Lining has sired currently 1238 offspring who hold close to 400 World Titles. Read More
  • Obituary - Chester Marbry

    The Report has recently learned of the passing of long time walking horse owner, Chester Marbry. A full obituary will he posted as it becomes available. Our thoughts and prayers go out to the entire Marbry family during this time. Read More
  • WHOA announces new show venues for 2022

    The Walking Horse Owners Association would like to announce that WHOA will sponsor the “Southern Belle Walking Horse Show” scheduled for March 10-12, 2022. The event will be held at the Georgia Horse Park, 1996 Centennial Olympic Parkway, Conyers, Georgia 30013. Read More
  • Latest Issue 11 22 21

    Read More
  • Obituary – Joel Roper “Huck” Moss, Jr.

    Joel Roper “Huck” Moss, Jr., husband of Peggy Ann Moss for 56 years, died November 17, 2021, after an extended illness. Mr. Moss was born on April 8, 1942, to the late Joel Roper “Bubba” Moss, Sr., and Margaret Gardner Moss.  Read More
  • TWHBEA names Derickson CFO

    The Tennessee Walking Horse Breeders' Association President, Jack Heffington, announced the hiring of Thomas Derickson as the Chief Financial Officer of Tennessee Walking Horse Breeders' Association, effective November 17, 2021. Read More
  • Mikey’s Motors donates cart to Celebration

    Mike and Chris Williamson with Mikey’s Motors recently donated a utility cart to The Celebration for use on the showgrounds. The cart, which is street legal and enclosed with heat and air will be utilized by Celebration staff in a number of ways throughout the course of the year. Read More
  • Horse of the Year online voting available for Trainers

    The Walking Horse Trainers' Association is excited to announce that they have launched electronic voting for this year's Horse of the Year awards.  With this voting, it is their hope to have made the process easier for trainers and that as a result there will be a greater participation in the voting process... Read More
  • Changes happening fast at TWHBEA; Focus turns to election

    The Tennessee Walking Horse Breeders’ & Exhibitors’ Association (TWHBEA) recently announced that Executive Director Margo Urad would end her term as Executive Director on December 6, 2021 and assume a new role as Director of Programs and Horse Show Development... Read More