Lyme disease is a tick-borne disease that can affect both dogs and humans. It was first discovered in Lyme, Connecticut. It was first observed in people in 1975 while dogs were found to also suffer from the disease in 1984.
Lyme disease is caused by the bacteria Borrelia burgdorferi which is transmitted to dogs, humans and other mammals via the bite of infected ticks which are commonly found in the Northeastern and Midwestern United States. The most common species of ticks commonly associated with transmission of Lyme disease are the deer tick.