I have a spring that is fed from a boggy patch in a field, a quarter of a mile uphill. I have sown watercress in the runoff and have an abundant crop. Until last October, there were sheep in the field with the spring, and they paddled among the reeds in the bog. I have been advised to avoid eating the cress, due to the possibility of liver fluke. Can anyone tell me how long this could live in the water, post sheep, and if it could transfer to humans in the uncooked watercress?
Thanks in anticipation..
Roy