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- 03:46, 1 June 2012 Z8600021 talk contribs uploaded File:Nematode - trichuris lifecycle.jpg (==nematode - trichuris life cycle== The unembryonated eggs are passed with the stool . In the soil, the eggs develop into a 2-cell stage , an advanced cleavage stage , and then they embryonate ; eggs become infective in 15 to 30 days. After ingestio)