neetis5 wrote:
it in it has become more widespread refers to Schistosomiasis.
its in that are the parasite's hosts for part of its life cycle refers to parasite's. So, effectively, this portion says -- ...the the freshwater snails that are the parasite's host for part of the parasite's life cycle.
Cheers!
Thanksneetis5 ! Yes, "its" is a possessive pronoun referring to the possessive "parasite's".
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