The affected horse has not left the premises for more than three weeks and was isolated immediately when clinical signs developed. The horse remains quarantined and is reportedly recovering.
The Arizona Department of Agriculture has confirmed three additional cases of EHV-1 in Maricopa County.
The affected horse has been euthanized, and state officials are testing additional horses stabled with or that live near the index case.
Two Quarter Horse geldings exhibited neurologic signs before testing positive for EHV-1 on May 7.
Some horses with neuromuscular disease could have a protozoan parasite Sarcocystis fayeri in their skeletal muscles, researchers learned.
The affected undervaccinated 8-year-old Quarter Horse stallion developed clinical signs on April 24 and was euthanized due to a poor prognosis.
Four of the six EHV-positive horses showed respiratory signs of disease (three of which have died) and two are showing neurologic signs.
The Canadian Food Inspection Agency national reference laboratory confirmed one case in the rural municipality of Beaver River and another in the rural municipality of Meadow Lake.
One additional case of EHV-1 abortion was confirmed in Humboldt County in April. The NDA did not issue a quarantine for this case because the incubation period has passed and no horses have been moved to or from the property.
The euthanized Quarter Horses geldings ranged in age from 3 to 9 years old.
A dressage horse recovered from EPM but still has an abnormal gait. An equine internal medicine specialist explains why owners of some horses with EPM might observe long-term gait and/or performance issues.
The affected 10-year-old gelding was vaccinated against EHV-1, is not showing neurologic signs of disease, and is recovering with veterinary treatment.
As mosquito season approaches, animal health officials are encouraging horse owners to have their animals vaccinated against EEE and WNV.
The positive Quarter Horse mare attended events at the Brazos County Expo Center and the Taylor County Expo Center in mid-April. She is currently quarantined and being treated by a veterinarian.
The ongoing Equine Respiratory Biosurveillance Program revealed new information on infectious respiratory disease threats, including EHV-1 and EHV-4, influenza, S. equi, equine rhinitis A/B viruses, and more. Here’s what you should know.
The 24-year-old pony mare began exhibiting clinical signs of disease on April 5 and was subsequently euthanized.
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