

Exposed horses now number 31.

The Sonoma County horse is undergoing treatment at a veterinary isolation unit.

All four premises are epidemiologically linked.

Officials suspect two additional cases of equine herpesvirus myeloencephalopathy.

A Webb County premises is currently under quarantine related to the case.

An additional 23 horses on the property were potentially exposed.

One of the horses attended at show in North Salem on March 4-5.

An additional 45 horses at the affected Los Angeles County boarding facility are currently under quarantine.

A mare showed neurologic signs of the disease on March 1. Three days later a second horse, her neighbor, exhibited a fever.

The 3-year-old Thoroughbred’s training facility is under quarantine.

The chief revision: addition of intrathecal lidocaine hydrochloride 2% with the horse in a surgical plane of general anesthesia.

Both facilities are under a 21-day voluntary quarantine.

Officials have deemed the cases unrelated.

Outbreaks worldwide prompt enhanced biosecurity recommendations for equine events.

This case has not been connected with international travel, transport, or exhibition.

Both horses were recently stabled at the World Equestrian Center, in Ocala, during competition.
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