Lymphatic Filariasis

A mosquito-borne parasitic infection that damages the lymphatic system and can cause severe swelling of the legs (elephantiasis).

InfectionMosquito-borneLast updated: 21 October 2026

Quick Summary

Primary Symptoms

Often no symptoms for years; later swelling of legs, arms or genitals (hydrocele), skin thickening and recurrent fevers.

Common Treatments

Mass drug administration programmes, antiparasitic medicines, limb hygiene and surgery for hydrocele.

Risk Factors

Living in areas where filariasis is common, and repeated mosquito bites.

OverviewSymptomsCausesTreatmentFAQ

Overview

Filariasis is caused by thread-like worms spread by mosquitoes. India runs mass drug administration to eliminate it.

Daily washing and care of affected limbs reduces infections and worsening.

Symptoms

Leg swelling

That can become severe.

Skin thickening

Hard, thick skin.

Fever attacks

With painful swelling.

Hydrocele

Swelling of the scrotum.

Causes & Risk Factors

Biological Causes

Infection with Wuchereria bancrofti or Brugia worms spread by mosquitoes.

Key Risk Factors

  • Location Endemic districts.
  • Mosquito bites Repeated exposure.
  • No preventive treatment Missing mass drug administration.

Management & Treatment

01. Medicines

Albendazole, DEC and ivermectin in programmes.

02. Limb care

Washing, drying and exercise.

03. Surgery

For hydrocele.

Frequently Asked Questions

Should everyone take the free medicines?
Yes, during mass drug administration, unless advised otherwise.
Can swelling be reversed?
Early care helps; advanced swelling may not fully reverse.

Sources and further reading

Last updated 21 October 2026. For more detail, see these trusted health organisations.