This video from “”A 55-year-old man presented with intermittent, crampy pain in the right lower quadrant of the abdomen. A colonoscopy was ordered and revealed multiple mobile 1-cm worms, Enterobius vermicularis, in the cecum."” - New England Journal of Medicine.
“”The human pinworm Enterobius vermicularis is a ubiquitous parasite of man, it being estimated that over 200 million people are infected annually. It is more common in the temperate regions of Western Europe and