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

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