Equine arteritis virus (EAV) is a virus that primarily affects horses, causing a disease known as equine viral arteritis. This virus is transmitted through respiratory secretions, direct contact, or contaminated equipment. Infected horses may show symptoms such as fever, swelling of the limbs, and respiratory issues. EAV can also be spread through breeding, as it can be present in the semen of infected stallions. While many horses recover from the infection, some may become carriers, posing a risk for future outbreaks. Vaccination is available to help control the spread of this virus among equine populations.