I had it done a few years ago. I don't know the answer to your specific question about
how the samples are run.
Anecdotally, everyone in my family who has an AI disorder (UC, Crohn's, and type 1 diabetes) came up as "reduced risk" for what they had. Guess environment plays a part...
dx'ed UC pancolitis 5/12
past meds: asacol hd, VSL#3, apriso, rowasa, xifaxan, 6mp, cortifoam, pentasa, cimzia, canasa, butyrate, flagyl, cipro, prednisone, remicade, methotrexate, cholestyramine, cortenema
current meds: butyrate
step one: colectomy, end ileo 1/16/13
step two: j-pouch construction, loop ileo 5/1/13