Reports of confirmed cases of equine herpesvirus-1 (EHV-1) continue to trickle in, in the States. The outbreak, believed to stem from horses that attended the National Cutting Horse Association's (NCHA) Western Regional Championships - held from late April into early May, in Ogden, Utah - has captured the collective attention of the American horse industry after numerous facilities quarantined horses.


Two horses in Florida were euthanized last week after one tested positive for neurologic EHV-1 and one was suspected of having the disease. A report from the Florida Department of Agriculture & Consumer Service's Animal Industry Division indicated that state officials do not believe the two Florida cases are related to the outbreak in the western United States.


"In a separate incident we have one farm in Alachua County (located in Northern Florida), which is under state quarantine, that has had two horses euthanized due to complications of EHV-1 infection (one case suspected and one confirmed)," the release read. "We believe that the index case occurred on the quarantined farm due to the re-emergence of a latent infection and that no exposure has occurred off the affected premises."


A related report from the attending veterinary hospital - North Florida Equine Veterinary Service in Newberry - indicated this appeared to be an isolated occurrence: "It is true that a case of neurologic herpes was recently diagnosed in Alachua County. It was at a private farm not adjoining any other horse properties. Horses on the property had not been to other farms, show facilities, or clinics. In short, exposure was very limited."