( ( ( ( ( Deer ticks ) , ) ( known ( scientifically ( as ( Ixodes dammini ) ) ) ) ) , ) ( ( are ( ( the insects ) ( that ( carry ( ( ( the bacterium ) ( -- ( ( Borrelia burgdorferi ) -- ) ) ) ( that ( causes ( Lyme disease ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Deer) (NNS ticks)) (, ,) (VP (VBN known) (ADVP (RB scientifically) (PP (IN as) (NP (NNP Ixodes) (NNS dammini))))) (, ,)) (VP (VBP are) (NP (NP (DT the) (NNS insects)) (SBAR (WHNP (WDT that)) (S (VP (VBP carry) (NP (NP (DT the) (NN bacterium)) (PRN (: --) (NP (NNP Borrelia) (NNP burgdorferi)) (: --)) (SBAR (WHNP (WDT that)) (S (VP (VBZ causes) (NP (JJ Lyme) (NN disease))))))))))) (. .)))
Deer ticks, known scientifically as Ixodes dammini, are the insects that carry the bacterium -- Borrelia burgdorferi -- 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.