How do you get a parasite?
You can get a parasite from eating raw foods (including sushi), walking barefoot over an infected area, or even cleaning out your cat’s litter box, Romero says. And there are many other ways of contracting a parasite.

Once a parasite gets into your body, it can manifest in a number of different ways. Some, like cryptosporidium, can settle into your small intestine and cause watery diarrhea, while others, like malaria, enter your bloodstream, causing fever, chills, body aches, and an enlarged liver.