Dracunculiasis occurs when people drink water contaminated with water fleas that carry guinea worm eggs.
Symptoms develop about a year after infection, when a large worm emerges under the skin. This causes a painful blister. When the blister bursts, the worm begins to exit the body.
The worm can be pulled out a few centimeters each day. The process usually takes weeks. Permanent damage is uncommon.
Last Updated Dec 18, 2019