( ( ( The transmission ) ( of ( Lyme ( disease ( Lyme disease ) ) ) ) ) ( ( is ( ( an infection ) ( caused ( by ( ( ( the ( spirochete ( Borrelia burgdorferi ) ) ) , ) ( ( a ( spiral-shaped bacterium ) ) ( ( most commonly ) ( transmitted ( by ( a ( tick bite ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN transmission)) (PP (IN of) (NP (NNP Lyme) (NN disease) (JJ Lyme) (NN disease)))) (VP (VBZ is) (NP (NP (DT an) (NN infection)) (VP (VBN caused) (PP (IN by) (NP (NP (DT the) (JJ spirochete) (NNP Borrelia) (NN burgdorferi)) (, ,) (NP (NP (DT a) (JJ spiral-shaped) (NN bacterium)) (VP (ADVP (RBS most) (RB commonly)) (VBN transmitted) (PP (IN by) (NP (DT a) (NN tick) (NN bite)))))))))) (. .)))
The transmission of Lyme disease Lyme disease is an infection caused by the spirochete Borrelia burgdorferi, a spiral-shaped bacterium most commonly transmitted by a tick bite.
(ROOT (S (NP (JJ Lyme) (NN disease)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NNS bacteria))))) (. .)))
Lyme disease is caused by bacteria.