EHV-1 Information

[June 6, 2012]

As expected, we are continuing to get sporadic reports of EHV-1. Biosecurity recommendations for horse farms can be found in the link above.

There have also been 3 cases of Eastern Equine Encephalitis confirmed in the coastal counties. This is the season for mosquito-borne diseases. See your veterinarian about vaccinating your horses for EEE and West Nile virus. See our EEE link under “Disease Programs” for updates

[Thursday, May 31, 2012]

A horse was confirmed as having the neurologic form of EHV-1.  This case is unrelated to the cases reported in early May.  Horse owners are encouraged to use good biosecurity.  Information on EHV-1 can be found in the "EHV-1 Health Alert!" link above.


[Monday, May 21, 2012]

There have been no new EHV-1 cases reported in Mississippi since the original cases that were reported May 9th, 2012. There have been no new reports from Tennessee or Kentucky.

[May 14, 2012] 4:00 pm

Mississippi: There have been no new EHV-1 cases reported in Mississippi, the affected and exposed horses continue to be isolated and monitored. The last cases were reported on Tuesday May 8th.

Kentucky: No new cases.

Tennessee: Late Monday afternoon, Tennessee reported two new cases which were euthanized. These cases were on farms already quarantined due to having an EHV-1 affected horse from the Tennessee trail ride on the premises. Therefore they do not represent spread to other farms.

[May 10, 2012]

The State Veterinarian's Office was notified on May 9th of two confirmed cases of Equine Herpes Myelitis (EHV).  In addition, four other cases of suspected EHV-1 have also been reported.  To date, three of these horses have died or been euthanized and three are ill with neurological disease.  All of the horses recently returned from the Bucksnort Trail Ride held April 23–30 in Humphreys County, Tennessee.  This event drew approximately 100 horses from multiple states.   The Tennessee Department of Agriculture and the Kentucky Department of Agriculture have also reported cases in their state related to this same trail ride.

The ill horses in Mississippi have been isolated and are being treated by their attending veterinarian.   All Mississippi Bucksnort Trail Ride participants are being notified about the situation and the necessity for isolation and monitoring horses taken to the event.  The potential for exposure to other horses is also being evaluated.  At this time, there has been no spread to other horses in Mississippi.

Equine Herpes Virus is highly contagious among horses but poses no threat to humans. The symptoms in horses may include fever, nasal discharge, wobbly gait, hind-end weakness, dribbling of urine and diminished tail tone. The virus is easily spread by airborne transmission, horse-to-horse contact and by contact with nasal secretions on equipment, tack, feed and other surfaces. Caretakers can spread the virus to horses if their hands, clothing, shoes or vehicles are contaminated. The virus can cause aborted foals and can be fatal.

Horse owners should practice good biosecurity such as using their own trailer and equipment, not letting horses touch other people's horses, disinfecting shoes and equipment, washing hands after helping others with their horses and limiting access to the farm. A downloadable brochure about horse biosecurity is available from the USDA Animal and Plant Health Inspection Services at .


EHV-1 and Neurological disease in horses is a reportable condition to the state veterinarian's office.

The MBAH reporting hotline number is (888) 646-8731.