PIERRE, S.D. (AP) — A highly contagious livestock disease continues to be found in South Dakota facilities.

The state Animal Industry Board says vesicular stomatitis virus has been found at 29 locations in five counties in western South Dakota since July 28. Twenty-seven of the premises have affected horses, while two cattle herds have also been infected.

The disease is transmitted by flies and midges. It infects mainly horses and cattle, though other animals including swine and sheep also are susceptible. It's rarely fatal but can cause economic hardship for people who own performance animals.

State Veterinarian Dustin Oedekoven recommends that livestock owners monitor their animals, especially those traveling for shows or other events.

The board says horses traveling to Huron for State Fair-related events must have a certificate of veterinary inspection issued within 48 hours of arrival.

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