You have a great husband :) A couple of thoughts:: buy the oil of oregano in Enteric Coated caps so they open up in the gut which they will. NOW brand has this available at iHerb.com
I used that product with goldenseal/myrrh combination (nature's way) with neem (nature's way) and boswellia and got ascarcis out.
Another idea is to do enemas with some of the anti parasite herbs to get them where they are. If all that does not work get some Albendazole (meds mex) and bomb them with that.
There are also some other formulas such as Mume (chinese) Ayurvedic formula from Banyan Botanicals and Raintree Nutrition has some South american herbs to do the trick.