Here are 4 foods that can give you parasites—and most people eat these all the time. #1 Sushi & Sashimi – Raw fish often contain worm larvae from infected waters. If not frozen properly, they hatch inside your intestines and can grow up to 30 feet long. #2 Oysters – These filter the ocean, meaning they absorb parasites, bacteria, and even viruses from polluted water—and you eat them alive. #3 Pork – If not properly cooked, it can carry trichinella parasites, which burrow into your body. #4 Farme