I have the exact same problem you do, Ascaris that I cannot seem to get rid of no matter what I do. I can kill adults with mebendazole, but if I stop for a couple of months there they are again. Theoretically this is because of the four stage life cycle of this worm, and meb only kills the adults in the gut. The rest, just come to the gut and mature and the cycle continues. I treated with meb for a full year. I was told that GcMAF can help the immune system kill the rest of the life cycles, but have had zero reaction to this stuff whatsoever (many people will herx to incredibly small amounts.) I could take a bath in the stuff.
I'm about ready to try the ozonated olive oil protocol by Hulda Clark . I already have the ozonator so why not. It is very frustrating and in addition lab tests were negative even though I could actually see the worms I passed. I suspect that countries who recognize their parasite problems would be better at treating them than the US is.