Re: It could be either way, what is worse? Who will know this for sure?

You ask GREAT questions and I think they're all up for consideration, possibly considered carefully.

Here's something of interesting from one of the other articles that I posted:

Antihelmintic Study


http://findarticles.com/p/articles/mi_qa3855/is_200403/ai_n9377657


"..., in T. trichiura, only the posterior portion of the worm (essential for defecation, copulation and oviposition) is free in the intestinal lumen, with the anterior portion being inserted in the intestinal epithelium. As regards A lumbricoides and hookworms, the whole body of the worm remains in the intestinal lumen. This slight difference in location of the adult worm may also imply differentiated exposure to antihelminthic drugs that act in the intestinal lumen."

Clever beast, aren't they?