The Illinois Department of Agriculture recently released a notice that two horses in a stable in northeastern Illinois tested positive for EHV-1 via nasal swab test. The Bureau of Animal Health and Welfare was notified on Monday, May 8th.
Additional horses at the same stable ran fevers during the week of May 4th. Three horses have exhibited neurological signs and two have been euthanized.
“It was also reported to the Bureau that several horses from this stable attended equine events on or about April 25th and on May 2nd. These venues have been contacted and are implementing steps to reduce the chances of additional exposures.”
According to United States Department of Agriculture Animal and Plant Health Inspection Service, the EHV-1 incubation period is between 1-10 days and signs are often seen between 1-3 days. Viral shedding occurs for 7-10 days, but can occur up to 28 days from the onset of signs.
Neurologic signs include ataxia, urinary bladder atony, and reduced tail tone, and in severe cases, horses will be unable to stand. USDA recommends monitoring of all exposed horses for at least 7 days and discontinuing or reducing strenuous exercise for exposed horses.