( ( The parasite ) ( ( is ( in ( ( its ( sporozoite stage ) ) ( at ( this point ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN parasite)) (VP (VBZ is) (PP (IN in) (NP (NP (PRP$ its) (JJ sporozoite) (NN stage)) (PP (IN at) (NP (DT this) (NN point)))))) (. .)))
The parasite is in its sporozoite stage at this point.
(ROOT (S (NP (NNS Sporozoites)) (VP (VBP are) (NP (NP (DT the) (NNS cells)) (VP (VBN caused) (SBAR (IN that) (S (NP (NNS parasites)) (VP (VBD spread) (PP (IN through) (NP (PRP$ their) (NN host))))))))) (. .)))