A horse in Northwestern Europe, suspected to have been transported illegally, has died from Swamp fever, a disease not typically found in the region. The horse was part of a seventeen-strong herd, but no other animals have shown signs of the disease, Equine Infectious Anemia (EIA). EIA can manifest as asymptomatic or acute, with symptoms including fever, lethargy, bleeding, and reduced appetite, and can become chronic if recovery occurs, leading to fever, anemia, weight loss, and edema. To prevent the disease from spreading, infected horses are required to be quarantined for life, at a distance of at least 200 meters from other horses.