Cysticercosis is a the most common parasitic infection of the central nervous system worldwide. It is caused by larvae of the tapeworm, Taenia solium, normally found in pork. The larvae, called cysticerci (singular cysticercus; also called bladder worms) form cysts in the body. If these worms are found in the intestine, they cause a different disease that is called teniasis, which is discussed in the Taenia solium and Taenia saginata articles.