Claim: Lyme disease is caused by tick bites from a bacteria some carry.
Evidence: Lyme disease , also known as Lyme borreliosis , is an infectious disease caused by bacteria of the Borrelia type.
The most common sign of infection is an expanding area of redness on the skin , known as erythema migrans , that begins at the site of a tick bite about a week after it has occurred.
Usually , the tick must be attached for 36 to 48 hours before the bacteria can spread.
Lyme disease is transmitted to humans by the bite of infected ticks of the Ixodes genus.