Interesting!
There was an article in my
Mental Floss magazine
http://www.mentalfloss.com/magazine/issues/?issue=0806
about how intestinal parasites and worms are being eradicated in the developed world and how it is making us sick.
One dude walked around latrines in some remote part of Africa to get worms on purpose cure his asthma.
Worth it?
My sister got foot long worms when she lived in Honduras (Not on purpose), she lost a TON of weight..but almost died in the process.