Man finds extreme healing eating parasitic worms

http://www.radiolab.org/2009/sep/07/ pretty sure a similar story was on radiolab too.

I believe interleukin is also made as a byproduct of the baking process in bread...where the crust has 8x higher concentration of interleukin than the other part of the bread. It is thought that bread crust can be a buffer in helping to reduce the chances of colon cancer.

I don't know though if interleukin-22 is the same as the interleukin made in the baking process.

Reminds of this classic Kuro5hin account of seeking hookworm infection as an asthma treatment:

http://www.kuro5hin.org/story/2006/4/30/91945/8971