The most common symptoms of Weil's disease in dogs are fever, vomiting, jaundice and anemia. Some additional symptoms include chills, red eyes and refusal of food.
According to the New York State Department of Health, Weil's disease, scientifically called leptospirosis, is a bacterial infection found not only in domesticated animals, but humans as well. The infection is spread through the urine of infected animals, so it is more common in farmers and others who work with animals or rats. Humans can also become infected through other means including contaminated food and water.
After being exposed, dogs can become ill anywhere from 2 to 30 days after exposure. The symptoms often appear suddenly and medical treatment is necessary to ensure a full and quick recovery. The disease is diagnosed through a blood test performed by medical personnel. Antibiotics designed to treat bacterial based infections are used to treat both animals and humans. The medications are obtained with a prescription from a veterinarian. If left untreated, dogs can become severely ill as the kidneys and other organs can begin shutting down. In extreme cases, death can occur.
When a domesticated animal has been diagnosed with the disease, owners should take precautions to prevent spreading of the animal. Preventive measures include proper hand washing and keeping the animal from urinating in high traffic areas.