Filariasis is a parasitic infection of the lymph vessels. It is more commonly known as “elephantiasis,” which refers to the enlargement of the lower limbs due to the disease.

Filariasis is caused by parasitic worms known as filarial nematodes (Wuchereria bancrofti, Brugia malayi, and Brugia timori). These worms are transmitted to humans through the bite of an infected mosquito.

Most infected persons do not develop any symptoms but may still suffer from damages to the lymphatic system and the kidneys, and from an altered immune system. 

Those who do get symptoms may experience: 
• Pain and swelling of the breast, vagina, scrotum, legs, and arms.
• Pain in the affected lymph nodes.
• Fever.
• Chills.
• Cough, difficulty breathing, wheezing (although these rarely occur).

Most infected persons do not develop any symptoms but may still suffer from damages to the lymphatic system and the kidneys, and from an altered immune system. 

Those who do get symptoms may experience: 
• Pain and swelling of the breast, vagina, scrotum, legs, and arms.
• Pain in the affected lymph nodes.
• Fever.
• Chills.
• Cough, difficulty breathing, wheezing (although these rarely occur).

Since filariasis is transmitted via mosquitoes, protection from mosquito bites is essential in preventing the disease:

• Wear long-sleeved shirts and long pants when working in farms or areas where filariasis is endemic.
• Sleep under a mosquito net or use mosquito repellent.