Having worms can be good for the gut

Parasites trigger immune reaction that can calm inflammation

whipworms

THE WORM TURNS  Intestinal parasites may have an upside. Researchers have discovered that people with whipworms (Trichuris trichiura, left) and mice with Heligmosomoides polygyrus (right) have fewer inflammation-provoking bacteria than they do without the worms. 

AJ Cann/Flickr (CC BY-SA 2.0);  D. Davesne/Wikimedia Commons (CC BY-SA 3.0

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