Interesting... isn't it. Here are some more references to worms and autoimmune disease...

Micro-worms to the rescue
Clinical trial looks to treat multiple sclerosis with hookworms
http://www.popsci.com/scitech/articl...o-worms-rescue

Parasitic Worms may offer effective treatment for Crohn's disease
http://www.medicalnewstoday.com/articles/17767.php

Clinical trial for hookworm and celiac disease
http://clinicaltrials.gov/ct2/show/s...ichuris&rank=5

And I've also met someone via forums who has used live pig whipworm eggs (Trichuris suis ova aka TSO) to treat gluten ataxia with some success.