The state Livestock Board says it will have an inspector at fairs across New Mexico to prevent the spread of a virus that gives animals blister-like lesions.

The board passed an emergency rule this week aimed at containing vesicular stomatitis.

The disease primarily affects horses, cattle and swine. While not fatal, it limits an animal’s ability to eat and move around.

The rule encourages a designated veterinarian at livestock events in the state to inspect animals. Those originating from New Mexico and participating only in state events can enter with a clean physical inspection or health certification issued within the previous five days.

New Mexico is the only state this year with confirmed cases of the disease. Most of the nearly 30 suspected or confirmed cases are in animals along the middle Rio Grande.