Equine Herpesvirus (EHV)

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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Equine Herpesvirus Confirmed in Maine

March 31, 2007

On March 28, 2007, a horse housed in a private stable in Rome, Me., was diagnosed with the neurologic form of equine herpesvirus-1 (EHV-1). The 3-year-old gelding had been euthanatized on March 19, 2007, after exhibiting severe neurologic signs... Read More

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Equine Herpesvirus Reported in Florida Horses

March 30, 2007

Two horses in a suburb of Tampa, Fla., were euthanatized last weekend after showing deteriorating clinical signs of the neurological form of equine herpesvirus-1 (EHV-1). Both horses tested positive for the virus on numerous samples submitted fo... Read More

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EHV: Leesburg Equine Medical Center to Reopen Friday

March 29, 2007

Officials at Virginia Tech's Marion duPont Scott Equine Medical Center announced today (March 29) that the facility will reopen to outpatients on Friday, March 30, following the Virginia Department of Agriculture and Consumer Services' issuance... Read More

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Herpesvirus Tests: All Clear at duPont Center in Virginia

March 29, 2007

Nathaniel White, DVM, MS, Dipl. ACVS, Jean Ellen Shehan Professor and Director of the Marion duPont Scott Equine Medical Center in Leesburg, Va., stated late this afternoon (March 29), "I am pleased to announce that yesterday, I received the... Read More

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Equine Herpesvirus: Vets Investigating Source of California Cases

March 28, 2007

Veterinarians are continuing to investigate the source of the recent outbreak of equine herpesvirus-1 (EHV-1) in San Mateo County, Calif. While some reports have claimed a link between these cases and a case from December, a veterinarian... Read More

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Equine Herpesvirus: Anatomy of an Outbreak

March 26, 2007

Researchers connected to an outbreak of equine herpesvirus-1 (EHV-1) in Ohio at the University of Findlay's English riding facility several years ago have recently published a report correlating age and specific clinical signs to horses' incidence... Read More

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Equine Herpesvirus: California Cases Cause Quarantines, Cancellations

March 25, 2007

Articles by Lisa M. Krieger of MediaNews group posted today (March 25) stated that the neurologic form of equine herpesvirus-1 (EHV-1) had claimed the lives of three horses and caused illness in several others on the San Mateo coast in... Read More

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California Equine Herpesvirus Update

March 20, 2007

Five horses have been confirmed positive for equine herpesvirus-1 (EHV-1) in San Mateo County, Calif. Results are pending on one other horse. Three horses have been euthanatized, and three are undergoing acyclovir antiviral treatment.

Wayne... Read More

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Equine Herpesvirus: Maryland Lifts Final Hold Orders

March 19, 2007

The Maryland Department of Agriculture today (March 19) received the final outstanding equine herpesvirus-1 (EHV-1) negative test results taken last week, for a total of 62 negative tests. As a result of these negative tests all properties... Read More

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Herpesvirus: Two California Horses Euthanatized

March 19, 2007

Veterinarians at the University of California, Davis, euthanatized two horses from San Mateo County last week after the horses showed neurologic signs and were confirmed positive for equine herpesvirus-1 (EHV-1). Three stables in the Moss... Read More

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Herpesvirus: More Horses Released from Equine Medical Center

March 16, 2007

Horses at Virginia Tech's Marion duPont Scott Equine Medical Center are being released from three of the four biosecurity perimeters that were established within the hospital. The Virginia Department of Agriculture and Consumer Services enacted... Read More

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Herpesvirus: Equine Medical Center Quarantine Partially Lifted

March 12, 2007

A quarantine imposed on Virginia Tech's Marion duPont Scott Equine Medical Center by the Virginia Department of Agriculture and Consumer Services Feb. 20 due to an equine herpesvirus (EHV-1) infection has been partially lifted. Tw... Read More

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Herpesvirus: Additional Virginia Quarantines Lifted

March 10, 2007

Virginia State Veterinarian Richard Wilkes, DVM, has lifted additional quarantines imposed due to equine herpesvirus-1 (EHV-1).

A farm in Fauquier County and the Marine Corps Base in Quantico have been released. The VDACS Web site contains... Read More

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Equine Herpesvirus: Three Virginia Quarantines Lifted

March 08, 2007

Virginia State Veterinarian Richard Wilkes, DVM, yesterday (March 7) lifted the quarantine on one farm in Middleburg, Loudoun County. Although a horse on the farm might have come in contact with an EHV-1 infected horse at the Equine... Read More