You might try raw garlic. It kills parasites anywhere in the body and
has even been found to kill the malaria parasite in animals. Here's a link
to treatment for the Strongyloides stercoralis that you talk about which is an
advertisement for a product that contains garlic as well as many other
things. I'm not promoting that site at all, just pointing out that garlic
kills all sorts of parasites - except it doesn't kill the eggs of worms.
You have to continue to take it until the eggs develop and all remaining worms
are killed.