Read More:

5 Reasons Parasites are Beneficial to the Earth
http://www.howstuffworks.com/environmental/green-science/5-reasons-parasites-beneficial.htm
"Parasites aren't all bad, though. In fact, some of them can actually be quite beneficial to humans and other living creatures."

'Parasitism is the most popular lifestyle on Earth'
http://www.newscientist.com/article/mg21929270.300-parasitism-is-the-most-popular-lifestyle-on-earth.html?cmpid=RSS|NSNS|2012-GLOBAL|online-news#.UfkXZWSgnip
"Parasites are all around us - humans alone have 100 - yet they receive little attention. That should change, says ecologist Kevin Lafferty"

Tapeworms in Humans
http://www.webmd.com/digestive-disorders/tapeworms-in-humans
"Tapeworms are flat segmented worms that live in the intestines of some animals."

Parasites - Dracunculiasis (also known as Guinea Worm Disease)
http://www.cdc.gov/parasites/guineaworm/biology.html
"Humans become infected by drinking unfiltered water containing copepods (small crustaceans) which are infected with larvae of D. medinensis."

The Potential Health Benefits of Parasitic Gut Worms
http://www.wired.com/wiredscience/2012/11/whipworm-immune-regulation/
"A dose of parasitic whipworms cured monkeys with chronic diarrhea, fixing immune systems gone haywire and offering a snapshot of what worms might do for people."

The 7 Most Horrifying Parasites on the Planet
http://www.cracked.com/article_17199_the-7-most-horrifying-parasites-planet.html
"As soon as your doctor says you've got parasites in your body, you don't need to hear any more details. They're all horrible, right? How can it get worse than little tiny worms or something feeding on your insides?"

Watch More:
App Diagnoses Malaria:
http://testtube.com/dnews/dnews-455-app-malaria
Future of Pollution:
http://testtube.com/stufftheydontwantyoutoknow/pollution-digging-deeper