👉 Gnotobiosis is a condition where a worm, such as a tapeworm or amoeba, grows in an organ of another organism. It can occur in any organ, but it is most common in the liver and spleen. The worms attach to the surface of the host cells and then grow inside them, causing inflammation and tissue damage. This condition is usually harmless, but some patients may experience symptoms such as nausea, vomiting, or abdominal pain.