Which organism is known for causing Lyme disease?

The organism responsible for causing Lyme disease is Borrelia burgdorferi. This is a spirochete bacterium primarily transmitted through the bite of infected black-legged ticks, commonly known as deer ticks. Lyme disease is characterized by symptoms including a distinctive rash known as erythema migrans, fever, fatigue, and muscle and joint aches.

Understanding the transmission and symptoms of Lyme disease helps clarify why Borrelia burgdorferi is the correct choice in this context. The other organisms mentioned cause different diseases: Rickettsia rickettsii is known for Rocky Mountain spotted fever, Treponema pallidum is the causative agent of syphilis, and Brucella abortus primarily causes brucellosis. Each of these organisms has unique characteristics and is associated with specific vectors and disease presentations that help differentiate them from Borrelia burgdorferi and Lyme disease.