"It is about the most awful thing you can imagine in terms of a non-fatal ailment. It's a parasitic disease and you know you've got it when at some point you develop a blister on your skin on your leg or your arm, and it's a burning blister and soon what emerges is a worm, and it's a worm that eventually, as it comes out, could be three-feet-long. It looks like a long strand of angel hair pasta and it's excruciatingly painful as it comes out. And the way it's transmitted is through drinking water. The worm, when it comes out, you've got that burning blister, your instinct is to want to immerse the skin in water. Well, when you do that, the worm puts out thousands and thousands of larvae that infects the drinking water. If anyone drinks the water, it gets into their system and a year later they develop a blister and out comes another worm."