First, though, let's talk about what the heck rat lungworm is. As the name implies, the parasitic roundworm that causes angiostrongyliasis (the scientific name for the disease) lives inside rat lungs, specifically inside the pulmonary blood vessels. Infected rats excrete the worms in their feces, where it can go on to infect other critters like snails, slugs, frogs and, yes, centipedes. Cooking any of these animals kills the parasite, so escargot fans needn't worry, but eating any of them raw may very well pass the roundworms on to you. You, a human, are what epidemiologists call an incidental host. Angiostrongylus cantonensis isn't trying to infect you, but if it finds itself in your bloodstream it'll make itself at home.