What do you mean, by "large ones?" My suggestion is: if you have any kind of strongyle, roundworm or pinworm infestation, I have achieved fast and dramatic die-off, of life-threatening, huge bloodworms you could put on a hook and go fishing with, and many roundworms, using a new equine de-wormer, called "EXODUS".
I took a dose for my approximate weight twice, three days apart. No side effects, but pretty great results, as none of the other equine de-wormers I have tried, recommended by Scabdraggr killed these huge worms, that were capable of killing me, with a blood clot.
I have three specimen now in a pill jar, preserved in rubbing alcohol, as these bloodsuckers are not any species I have seen in a human, in any research I have done, however, they resemble the schistosoma images I have seen online, but are 2" long and very thick.
Yes, it is disgusting, and revolting to even imagine you are a host to such horrible crud. Scabdraggr recommended I save anything of interest, so I did, and now have irrefutable PROOF we all need that we are not delusional and that we are all parasite factories, and that parasite removal will be a lifelong task for all of us, as there is no way we can escape becoming reinfected, as long as we are on the right side of the grass.