Who among us leaves childhood without singing this ghoulish schoolyard refrain: "The worms crawl in, the worms crawl out, in your stomach and out your mouth." The morbid yuck factor that makes that ...

These killers lie dormant, waiting for the right time to strike. Eleven-month-old Garrett Richardson ingests the eggs of a worm, and within days the creature travels to his brain and goes about ...

Part horror movie, part medical detective story, find out what happens when people fall prey to an infection from a parasite, those nasty microscopic creatures found in water, soil and even in the air ...