I agree with you that parasites in themselves are "annoying" -- truly that is an understatement. They are very destructive and hurtful.
What I find fascinating is that people are finding different organisms and creatures that I didn't think was possible to survive or live in people's bodies. Pioneer1 has mentioned and shown a picture with finding a claw-like creatures, yours with many legs, and 70428 with a broom-like structure. These things are unusual. Without people coming forward it would be impossible to know that they even exist. I want to thank you for sharing.
I know that Apxr has found worms that look like they have grown wings! There is another one that I've viewed with 8 legs; it looks like some kind of a starfish creature. (If I have the time, I'll see if I can get them posted.)
"Anyway, I'd find it hard to believe that a centipede type creature could live inside a person, though I think I've seen some ocean critter that looked like a centipede. This was too gelatinous to be related, I think. The 'legs' were long, but not longer than the 1" bodies."
I think, I've seen some ocean creatures too and may know what you're referring to.