( Trichomoniasis ( ( is ( ( caused ( by ( protozoan infection ) ) ) ( with ( Tritrichomonas foetus ) ) ) ) . ) )
(ROOT (S (NP (NNS Trichomoniasis)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NN protozoan) (NN infection))) (PP (IN with) (NP (NNP Tritrichomonas) (NNS foetus))))) (. .)))
Trichomoniasis is caused by protozoan infection with Tritrichomonas foetus.
(ROOT (S (NP (NNS Trichomoniasis)) (VP (VBZ is) (VP (VB cause) (PP (IN by) (NP (DT a) (NN protozoa))))) (. .)))