Parker County Today September 2017 - Page 67

incoordination, hind end weakness, recumbency / paralysis, lethargy, urine dribbling, decreased tail tone, and/or head tilt. It is important to consult with your local veterinarian when deciding which horse(s), if any, to test for EHV on nasal swabs and blood because some percentage of the normal horse population will be cycling virus without displaying clinical signs of the disease. PREVENTION: For all of the equine herpes viruses, vaccination is not fully protective. An effective immune response requires a local mucosal response, systemic antibody production, and a cell mediated immune response. No current vaccine achieves all of these measures. Current EHV vaccines may reduce the amount of the virus shed in secretions of the respiratory tract, but do not protect against the neurologic form. Unfortunately, boostering well vaccinated horses during an outbreak is not helpful. Vaccinations 14 days prior to exposure are not likely to be harmful, and may help limit the spread of the disease.   BIOSECURITY: Horses with confirmed equine herpes myeloencephalopathy should be isolated and the farm quarantined. Strict hygiene and biosecurity measures should be implemented because the virus can be aerosolized. A secondary containment should be setup for exposed horses to control the spread of the virus. If it is necessary to admit a horse to a farm with ongoing cases, they should be current on EHV-1 vaccination and isolated away from the resident population. The neuropathic strain of EHV-1 can also cause abortion and location of pregnant mares should be considered during an outbreak. TREATMENT: The prognosis after infection is dependent on the severity of the neurologic symptoms and the duration of recumbency. The disease spreads quickly and can have high morbidity and mortality. Most cases are treated symptomatically, although some practitioners have used antiviral therapy. Symptomatic therapy includes NSAIDs, DMSO, aspirin, L-lysine, vitamin E and/or corticosteroids, along with nursing care. Neurologic or recumbent horses can be maintained in a sling for a short period of time in referral facilities or in custom setups on the farm. PROGNOSIS: Horses that remain standing have a go ۛ\܈Xݙ\H[[\ݙ[Y[\[\[BY[[H]^\ˈ]\]X^HZ\[۝›ݙ\HYX\YܙHHܜH\\][HXݙ\Y[]\Y]][\][و\ܛX[KYBܜ\X^HHY]\X[[\YX[]\X™YX]˂ܘZYX]8(H][8(XHX[ HL8(X]\ܙ ^\8( MM N LMBX[[[X[8(\]Z[H8(]\8([X[]ܞH\X\