Taeniasis is a parasitic disease due to infection with tapeworms belonging to the genus Taenia. The two most important human pathogens in the genus are Taenia solium (the pork tapeworm) and Taenia saginata (the beef tapeworm). The third species Taenia asiatica is found only in East Asia. Taeniasis is generally asymptomatic, but severe infection causes weight loss, dizziness, abdominal pain, diarrhea, headaches, nausea, constipation, chronic indigestion, and loss of appetite.A type of taeniasis called cysticercosis is caused by accidental infection with the eggs of T. solium from contaminated food and water. It is known as the most pathogenic form caused by tapeworms. A specific form of cysticercosis called neurocysticercosis is said to be the most common infection of the central nervous system.