[anonymous]

http://www.vetstreet.com/care/lyme-disease-in-dogs excerpt below
Lyme disease is one of a number of frustratingly common tick-borne diseases that are regarded by both veterinarians and human physicians as stubborn, insidious, and just plain problematic in a number of ways.
An infection caused by the Borrelia burgdorferi bacterium, Lyme disease is transmitted through the bite of an infected tick and can affect many species, including dogs and humans.
Ticks of the Ixodes species (called deer ticks) are known to transmit Lyme disease when they attach to a host and feed. Because the tick must be attached for at least 50 hours to transmit Lyme disease, frequent inspection for ticks (and quick removal) can reduce the risk of disease transmission.
Lyme disease is more common in certain areas of the United States, including the Northeast, Mid-Atlantic, and upper Midwest.