Enterobius vermicularis: 10,000-Year-Old Human Infection (Science Magazine)
"Eggs of Enterobius vermicularis (human pinworm) were found in hum coprolites from Hopug and Danger Caves, western Utah. The Caves were inhabitated by man from 10,000 B.C. to A.D. 1400. The oldest coprolite containing dated at 7837 B.C. This represents the earliest known association between man abd this exclusively human parasite."
Eat Your Worms: The Upside Of Parasites (NPR)
"For years evidence has been mounting that intestinal parasites can actually be a good thing for people with inflammatory bowel disease because certain parasitic worms seem to help the intestine heal."