( ( ( Psittacosis Psittacosis ) ( -LRB- ( ornithosis -RRB- ) ) ) ( ( is ( ( an ( infectious disease ) ) ( caused ( by ( ( ( ( Chlamydia ( psittaci bacterium ) ) ( which ( affects ( numerous ( wild ( and ( domesticated ( bird species ) ) ) ) ) ) ) ) and ) ( ( particularly psittacine ) birds ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Psittacosis) (NNP Psittacosis)) (PRN (-LRB- -LRB-) (NP (NNS ornithosis)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT an) (JJ infectious) (NN disease)) (VP (VBN caused) (PP (IN by) (NP (NP (NP (NNP Chlamydia) (NN psittaci) (NN bacterium)) (SBAR (WHNP (WDT which)) (S (VP (VBZ affects) (NP (JJ numerous) (JJ wild) (CC and) (JJ domesticated) (NN bird) (NNS species)))))) (CC and) (NP (ADJP (RB particularly) (JJ psittacine)) (NNS birds))))))) (. .)))
Psittacosis Psittacosis (ornithosis) is an infectious disease caused by Chlamydia psittaci bacterium which affects numerous wild and domesticated bird species and particularly psittacine birds.
(ROOT (S (NP (NNS Bacteria)) (VP (VBP are) (NP (NP (DT the) (RBS most) (JJ numerous) (NNS species)) (PP (IN on) (NP (DT the) (NN planet))))) (. .)))