Are you sure it's not Camelanus?
IF so, you'll need a swine/cattle dewormer. I think it's called Levisol.It dosen't kill the parasite, it just sort of knocks it out so it releases itself from the intestinal wall, the fish craps them out and then you have to do something like a 90% water change and vacume up all the worms up from the bottom of your tank. I did this to a Blue Dempsy years ago.
The worm sticks out of the vent and goes back in, it starts off white, then as it feeds on your fish it becomes pink from the blood it ingests.