Equine Herpesvirus (EHV)


Herpesvirus Hold Order Lifted in Maryland

January 25, 2008

The Maryland Department of Agriculture has lifted the "investigational animal hold order" on Barn 7 and the isolated barn on the grandstand side of the Bowie Training Center after follow-up testing on the initial nasal swab samples sent to the... Read More


Herpesvirus Test on Maryland Horse Deemed Inconclusive

January 24, 2008

Blood samples on a horse that was ordered into isolation by the Maryland Department of Agriculture on Tuesday were negative for equine herpesvirus-1 (EHV-1). The "investigational animal hold order" is still in place on Barn 7 of the... Read More


Equine Herpesvirus: Maryland Training Center Barn Quarantined

January 23, 2008

The Maryland Department of Agriculture announced Jan. 22 that horses stabled in Barn 7 at the Bowie Training Center cannot leave until test results are completed for a horse showing clinical signs suggestive of equine herpesvirus.

Equine... Read More


Consider EHV-4 in Neurologic Herpes Cases

January 17, 2008

Sometimes everything appears to add up in an outbreak of what resembles equine herpesvirus-associated myeloencephalopathy, the dreaded neurologic condition generally caused by equine herpesvirus-1 (EHV-1) infection that causes ataxia or... Read More


Test Suggests Ubiquitous Herpesvirus Strains Play Role in Abortion

January 11, 2008

Researchers from France have determined equine herpesvirus (EHV)-2 and -5 might play a small role in equine abortion. They used a sensitive and rapid polymerase chain reaction (PCR) test--one that can identify sections of viral DNA--in their... Read More


Tiny Shift in Herpesvirus Causes Neurologic Form

November 13, 2007

Sometimes a small change can make a big difference. Such is the case with equine herpesvirus, according to researchers with Cornell's College of Veterinary Medicine. When it comes to the virus, a change in just one amino acid can make... Read More


Churchill Downs Herpesvirus Quarantine Lifted

November 07, 2007

Kentucky State Veterinarian Robert C. Stout, DVM, has lifted the quarantine on a barn at Churchill Downs after test results confirmed that the remaining horses in the barn were not infected with equine herpesvirus-1 (EHV-1).

Stout imposed... Read More


Equine Herpesvirus Research: Protecting Against the Neuropathogenic Strain

November 06, 2007

The most common infectious equine viruses are herpesvirus and influenza. So when a viral pathogen of one of them evolves and increases in virulence, and if there are no effective prevention or treatment options available for use against the... Read More


Herpesvirus Confirmed in North Dakota

November 03, 2007

A North Dakota State University Extension Service horse expert says several cases of equine herpesvirus (EHV) have been reported in North Dakota and surrounding states.

EHV leads to infections, and it's common throughout the United... Read More


Half of Churchill Downs Herpesvirus Quarantine Lifted

October 31, 2007

The Kentucky Department of Agriculture has lifted a quarantine order for half of Barn 47 at Churchill Downs, which was placed under quarantine Oct. 26 after a horse was found to be infected with equine herpesvirus-1 (EHV-1).

Sixteen horses... Read More


Churchill Downs Herpesvirus: Tests Indicate Virus Isolated to One Horse

October 30, 2007

Thirty-five horses stabled in a barn at Churchill Downs where one other horse tested positive for equine herpesvirus-1 (EHV-1) have tested negative for the disease, leading track officials to believe the case is isolated.

According to an... Read More


Herpesvirus-1 Positive Horse in Kentucky

October 30, 2007

One barn containing 19 horses at Churchill Downs Thoroughbred racetrack in Louisville, Ky., remains under quarantine today (Oct. 30) by the Kentucky state veterinarian's office due to a horse testing positive for equine herpesvirus-1 (EHV-1) and... Read More


Churchill Downs Officials Hope EHV-1 Case Isolated

October 28, 2007

Officials at Churchill Downs say a case of equine herpesvirus (EHV-1) confirmed in one horse should have limited impact on the fall meet that begins Sunday, as long as the disease is contained.

The Kentucky Department of Agriculture on... Read More


Herpesvirus: Oregon State Vet School to Host Meeting for Horse Owners

August 13, 2007

The Oregon State University College of Veterinary Medicine will be hosting an informational meeting for horse owners after a second horse was reported to have the respiratory form of equine herpesvirus-1 (EHV-1).

According to a statement by... Read More


Health Problems of Young Horses in Training

August 01, 2007

Young horses in training are vulnerable to a wide variety of problems--everything from respiratory disease to training injuries. These horses are often taken off the farm where they grew up, transported to training facilities where they... Read More


New Respiratory Ailment Identified; Progressive Disease Might Have Link to EHV-5

July 26, 2007

Researchers have recently identified a new equine respiratory ailment that presents clinical signs similar to heaves, but that is progressive and has a poor prognosis for affected horses. The researchers have postulated that the disease, dubbed... Read More


A Look Inside: Veterinary Internists Meet in Seattle

July 23, 2007

Veterinary internists met June 6-9 in Seattle, Wash., for the 25th Forum of the American College of Veterinary Internal Medicine (ACVIM) to discuss the latest research on the internal workings of horses and other animals.

Summarized below are... Read More


Respiratory Viruses Detected at Shows, Sales

July 18, 2007

In a survey of horses arriving at several different show and sale facilities, researchers found that as many as 4% of the population were shedding equine herpesvirus-1 (EHV-1) from nasal passages, and as many as 2% were shedding equine... Read More


Awakening the Dormant Dragon: The Neurological Form of EHV-1

May 27, 2007

Recently, a number of racetracks, private veterinary clinics, and university teaching hospitals outside of California were shut down to limit the spread of the neurological form of equine herpesvirus-1 (EHV-1) infection.

California had at... Read More


Herpesvirus at Balmoral Harness Track Leads to Increased Precautions

May 03, 2007

After 20 horses at Balmoral Race Park, Crete, Ill., tested positive for neurologic equine herpesvirus-1 (EHV-1) last week, track officials have instituted numerous precautions to minimize the commingling of horses and opportunity for transmissio... Read More


Update on an EHV-1 Survivor

April 17, 2007

Radar, a 22-year-old Quarter Horse at a private stable in Glenelg, Md., looks good for his age. He looks even better when you consider that two years ago he was given a 50/50 chance of survival when stricken with the neurologic form of equine... Read More


Demystifying Neurologic Herpes

April 16, 2007

Our attention has recently been captured by reports of numerous outbreaks of equine herpesvirus-1 (EHV-1) neurologic disease at racetracks, show venues, clinics, and boarding stables across the country. Questions about the neuropathogenic... Read More


EHV: Tests Ongoing for Cause of Hong Kong Fevers

April 14, 2007

The cause of mild fevers in 132 horses at Hong Kong's Sha Tin Racecourse is still under investigation, according to Brian Stewart, BVSc (hons), MBA, head of Veterinary Regulation and international liaison for the Hong Kong Jockey Club. The... Read More


Kentucky Horse Park Recommending EHV Vaccination

April 12, 2007

The Kentucky Horse Park announced several changes which will affect those who wish to compete at the park.... Read More


Equine Herpesvirus Infects 132 Horses in Hong Kong; No Neuro Signs Reported

April 10, 2007

According to reports, 132 horses at Hong Kong's Sha Tin Racecourse have contracted equine herpesvirus (EHV). Track officials have not reported any neurologic signs.

The infected horses have shown mild fevers and unspecified... Read More