Last revised by Mostafa El-Feky on 3 Nov 2022

Filariasis refers to infection with nematodes (roundworms) of the family Filarioidea. There are three species of these thread-like filarial worms:

  • Wuchereria bancrofti: responsible for 90% of cases

  • Brugia malayi: causes most of the remainder of cases

  • Brugia timori: an uncommon cause

It can affect a number of organ systems of which the most recognized include:

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Cases and figures

  • Figure 1: filariasis of the right leg
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  • Case 1: involving breast
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  • Case 2: in breast
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