AMES, Iowa – The worms can live inside your body for years, decades even. And it’s not the worms themselves that will eventually make you sick. Rather, it’s the thousands of eggs they lay.

Here’s a comforting thought: you might not actually be alone in your own body right now. Parasites are far more common than most people realize, and they don’t care about your personal boundaries, ...

If a worm was trying to burrow into your skin, you'd be forgiven for thinking you'd feel it gnawing at your flesh—but scientists have identified how one wriggling parasite does so without you noticing ...