What are Worms?

Wormlike parasites usually (but not always) live in the gastrointestinal tract (the gut). Some can also infect the bloodstream or tissues. Common symptoms can appear through their very presence (they cause a blockage in the gut, the bile duct in the liver, or the lymphatic vessels), or they will deprive the body of nutrients.

Common culprits include pinworm, roundworm, whipworm, hookworm, tapeworm and threadworm.