• “The best private organization-based site that can be recommended to patients for education on Lyme disease is that of the American Lyme Disease Foundation."
    (Clinical Infectious Diseases, 35: 451-464, 2002)

What is Lyme Disease?

Lyme disease (LD) is an infection caused by Borrelia burgdorferi, a type of bacterium called a spirochete (pronounced spy-ro-keet) that is carried by deer ticks. An infected tick can transmit the spirochete to the humans and animals it bites. Untreated, the bacterium travels through the bloodstream, establishes itself in various body tissues, and can cause a number of symptoms, some of which are severe. LD manifests itself as a multisystem inflammatory disease that affects the skin in its early, localized stage, and spreads to the joints, nervous system and, to a lesser extent, other organ systems in its later, disseminated stages. If diagnosed and treated early with antibiotics, LD is almost always readily cured. Generally, LD in its later stages can also be treated effectively, but because the rate of disease progression READ MORE >>

Borrelia burgdorferi

Lyme disease (LD) is an infection caused by Borrelia burgdorferi, a type of bacterium called a spirochete (pronounced spy-ro-keet).

Deer Tick or Black Legged Tick

If you happen to find a tick attached to your skin, watch our tick removal video. Click here to visit our videos page.

Lone Star Tick

Lone Star ticks do not transmit Lyme disease, although they are capable of transmitting other tick-borne diseases.

Dog Tick

In some regions, dog ticks are common vectors for Rocky Mountain Spotted Fever; however, not all bites result in infection.

What is a tick?

Ticks are not insects but Arachnids, a class of Arthropods, which also includes mites, spiders and scorpions. They are divided into two groups – hard bodied and soft bodied – both of which are capable of transmitting diseases in the United States.

Ticks are parasites that feed by latching on to an animal host, imbedding their mouthparts into the host’s skin and sucking its blood. This method of feeding makes ticks the perfect vectors (organisms that harbor and transmit disease) for a variety of pathogenic agents. Ticks are responsible for at least ten different known diseases in humans in the U.S., including Lyme disease, Rocky Mountain spotted fever, babesiosis, and more recently, anaplasmosis and ehrlichiosis.

Educational Materials

Educational Materials: To achieve its mission, the ALDF provides an array of brochures, tick ID cards and other materials that contain current information on symptoms, diagnosis and treatment guidelines, prevention strategies, and methods of tick-control. Individuals, schools, physicians’ offices, health departments, corporations, and many other organizations may order bulk quantities of these materials for a modest fee. A Spanish language brochure is also available. It should be noted that all of these materials may be downloaded and printed directly from our website.