5 Cases EHV-1 Confirmed in Los Angeles

Saddlebred Horse

Burbank, California – Five California horses boarded at the Las Angeles Equestrian Center have tested positive for EHV-1.  Four of the five competed in Las Vegas on October 27, where they are believed to have contracted the virus.  On November 3rd, two horses were tested positive, including a 5-year-old Saddlebred that was euthanized due to the severity of its infection.  The following day, three additional horses were found positive, including two which were at the Las Vegas show.  It is unknown how many of the infected horses will ultimately be euthanized.  The Equestrian Center is in quarantine to stop the spread of the disease.

Equine Herpes Virus (EHV-1) infection in horses can cause respiratory disease, abortion in mares, neonatal foal death and neurological disease. The neurological form of the disease is known as Equine Herpes Myeloencephalopathy (EHM) and may be caused by damage to blood vessels of the brain and spinal cord associated with EHV-1 infection. EHM is most often due to the neuropathogenic strain of EHV-1, but may occasionally be caused by the non-neuropathogenic strain of the virus.

EHV-1 is easily spread and typically has an incubation period between 2-10 days. Respiratory shedding of the virus generally occurs for 7-10 days, but may persist longer in infected horses. For this reason, a twenty-one day isolation period of confirmed positive EHM cases is recommended along with stringent biosecurity protocols. Similar to herpes viruses in other species, the latent form of EHV-1 can reactivate at a later date, but generally with a low viral load posing a low risk of infecting other horses. Humans are not at risk of contracting the virus, however humans can act as an indirect mode of transmission. (CDFA)

EHV-1 is non-contagious to humans.

Note: Featured image not of horses in this story.

Author: Dale Williams <-- Become my friend on Facebook! - Phone: 724-964-6773

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