Lyme Disease

Lyme Disease

Vector Insect(s) - Deer Tick (Black-Legged Tick)

By far the most common tick-borne disease in the U.S., Lyme is caused by bacteria carried by deer ticks (in the northeastern, mid-Atlantic, and north-central U.S.) and the western blacklegged tick on the Pacific Coast. In most cases, the tick must be attached 36-48 hours to spread Lyme disease. A circular, red, expanding rash (erythema migrans, or a “bullseye” rash) is one of the first symptoms of Lyme disease. Other symptoms include fatigue, chills, fever, headache, muscle and joint aches, and swollen lymph nodes.

Prompt treatment in the early stages with antibiotics usually cures the disease, but some people experience lingering symptoms that research suggests do not improve even with continued antibiotic treatment.

Serious Side Effects

In rare cases, lasting joint pain, neurologic damage, facial paralysis, or heart problems.

Symptoms appear

Three to 30 days after a bite.


Antibiotics (usually doxycycline or amoxicillin) as soon as symptoms appear.