ICD-11 1F66.3 — Lymphatic filariasis
Infestation by filarial nematodes of the genera Wuchereria and Brugii. It is acquired via transcutaneous injection of larvae by mosquitoes previously infested with microfilariae from the blood of a human host. The adult worms live in the lymphatics but release microfilariae into the bloodstream to complete the life cycle of the parasite. Clinical disease occurs in only a minority of those infected. In the acute stage this may present as an acute painful adenolymphangitis with fever. Chronic infestation causes progressive obstruction of lymphatic vessels and can result in disfiguring lymphoedema (elephantiasis), particularly of the genitalia and lower extremities.
The diagnosis includes nothing.
- Lymphoedema due to lymphatic filariasis (BD93.13)
Diagnosis with code 1F66.3 contains 4 clarifying diagnoses:
- 1F66.30 — Filariasis due to Wuchereria bancrofti
- 1F66.31 — Filariasis due to Brugia malayi
- 1F66.32 — Filariasis due to Brugia timori
- 1F66.3Z — Lymphatic filariasis, unspecified