On the link that you provided I saw this astounding picture:
Ascaris lumbricoides expelled following effective drug treatment. Source: Courtesy of Dr. Tom Nutman, NIH.
This goes to prove that there aren't just a few parasites, but the numbers of parasitic worms can run up into the thousands. Imagine the weight loss with loosing this kind of load!
Ascariasis
Ascariasis 
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16 y
5,858
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