( ( ( Ixodes scapularis ) ( -LRB- ( Black-legged -RRB- ) ) ) ( ( ticks ( ( ( transmit ( Borrelia burgdorferi ) ) , ) ( ( the bacterium ) ( that ( causes ( Lyme disease ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Ixodes) (NNS scapularis)) (PRN (-LRB- -LRB-) (NP (NNP Black-legged)) (-RRB- -RRB-))) (VP (VBZ ticks) (NP (NP (NNP transmit) (NNP Borrelia) (NNP burgdorferi)) (, ,) (NP (NP (DT the) (NN bacterium)) (SBAR (WHNP (WDT that)) (S (VP (VBZ causes) (NP (JJ Lyme) (NN disease)))))))) (. .)))
Ixodes scapularis (Black-legged) ticks transmit Borrelia burgdorferi , the bacterium that causes Lyme disease.
(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.