Influenza Virus Infects at Least Three Horses in Oregon

Newsdate: Thu, 25 July 2013 - 2:25 am
Location: CORVALLIS, Oregon

The Veterinary Teaching Hospital at Oregon State University is not accepting horses for anything but emergency services until at least Tuesday, July 30, due to an outbreak of equine influenza virus at the hospital.

On the look-out for influenza cases in horses

On the look-out for influenza cases in horses

Three horses are known to be infected with the influenza virus and are being treated at the Veterinary Teaching Hospital at Oregon State University.

So far, three horses are known to be infected with this virus, and others could be according to officials.. The virus is a highly contagious respiratory disease in horses that typically is not fatal, but is a particular concern to foals and pregnant horses, since it can cause abortion.

Other than equines, the situation will not affect the care of any other small or large animals at the hospital.

The three infected horses have been placed in isolation and are being treated. Officials say they wish to emphasize that this is equine influenza virus, not equine herpes virus-1, a more serious disease that is often confused with the influenza virus.

Equine influenza is not transferable to humans or other animal species, but can spread rapidly among horses and other equines. It is the most common contagious respiratory pathogen for horses and most animals fully recover. However, young, elderly or pregnant animals are more at-risk for viral diseases such as equine influenza.

The first clinical sign in horses is typically a fever, followed by cough, nasal discharge and lethargy. Horses with a fever of greater than 102.5 degrees should be seen by a veterinarian.

Infected horses can “shed” or transmit the virus for up to 10 days after incubation, although the peak of shedding is three to five days after infection. Horses that show signs of the disease should be isolated from other horses for 10 days after clinical signs first appear.

The virus is easily killed by many disinfectants, and thorough cleaning of stalls and equipment can help prevent the virus from spreading. Vaccination of horses during an outbreak in a training facility or barn can be beneficial, in consultation with a veterinarian.

About the Author

Flossie Sellers

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As an animal lover since childhood, Flossie was delighted when Mark, the CEO and developer of EquiMed asked her to join his team of contributors.

She enrolled in My Horse University at Michigan State and completed a number of courses in everything related to horse health, nutrition, diseases and conditions, medications, hoof and dental care, barn safety, and first aid.

Staying up-to-date on the latest developments in horse care and equine health is now a habit, and she enjoys sharing a wealth of information with horse owners everywhere.

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