Horse Diseases and Disorders: An Issue of Veterinary ClinicsAbout This Hardback Horses are odd toed ungulate mammals of commercial and domestic significance. The breed, environment and management of horses directly impact the lifespan of horses. They can be affected by several diseases and infections such as potomac horse fever, equine arthritis, botulism, laminitis, etc. The bacterial infection caused by an organism known as neorickettsia risticii is called potomac horse fever. Depression, fever and diarrhea