Filariasis  is a parasitic disease and is considered an infectious tropical disease, that is caused by thread-like nematodes (roundworms) belonging to the superfamily Filarioidea, also known as “filariae”.

Picture by Eldeeb Mabrouk, University Hospital, Alexandria, Egypt (source)

Lymphatic filariasis is caused by the worms Wuchereria bancroftiBrugia malayi, and Brugia timori. These worms occupy the lymphatic system, including the lymph nodes, and in chronic cases these worms lead to the disease elephantiasis.

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