The guinea worm spreads via drinking egg-infested water. When the parasite becomes fully developed in the human body, it migrates to the skin where it causes bl

The guinea worm spreads via drinking egg-infested water. When the parasite becomes fully developed in the human body, it migrates to the skin where it causes blisters accompanied by burning pain. The pain induces the host to immerse the boil in water; immediately relieving the pain - and allowing the parasite to release its eggs for the next host to drink.