Lymphatic filariasis is spread by infected mosquitoes. Their bites deposit a parasite that travels to the lymph system.
Most cases are symptomless. Rarely, long-term damage to the lymph system causes swelling in the legs, arms, and genitalia. It also increases the risk of frequent bacterial infections that harden and thicken the skin (elephantiasis).
A drug taken yearly can kill the parasites.
Last Updated Jun 13, 2017