parasites probably love iodine. It probably makes them more healthy than the iodine-starved parasites present in most people.
I know I must have a parasite or two around here somewhere, and I am proud that mine are healthy. No joke. Our bodies were created (evolved for the athiests) to accommodate parasites, probably for good , healthy reasons and really the only problems come when their populations are disproporationately increased, as we see with people in some countries.
I've proposed giving bromdes to people who have an excessive load of parasites, but I'm not aware that they took me seriously. If I had a problem with them, I'd determine the structure of their sex hormones, and given them a fluoridated analog of it so as to poison their little enzyme systems. So many molecules, so little time left for the Vulcan on the blue planet ..... I wish Scotty would get his $#& back here already.