( ( ( The ( test kit ) ) ( for ( ( the ( rickettsial bacterium ) ) ( which ( causes ( Lyme Disease ) ) ) ) ) ) ( ( ( tests ( for ( ( the presence ) ( of ( an ( antigen specific ) ) ) ) ) ) ( to ( ( the surface ) ( of ( this bacterium ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN test) (NN kit)) (PP (IN for) (NP (NP (DT the) (JJ rickettsial) (NN bacterium)) (SBAR (WHNP (WDT which)) (S (VP (VBZ causes) (NP (NNP Lyme) (NNP Disease)))))))) (VP (VBZ tests) (PP (IN for) (NP (NP (DT the) (NN presence)) (PP (IN of) (NP (DT an) (NN antigen) (NN specific))))) (PP (TO to) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (DT this) (NN bacterium)))))) (. .)))
The test kit for the rickettsial bacterium which causes Lyme Disease tests for the presence of an antigen specific to the surface of this bacterium.
(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.