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Parasite and Vector


Description

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Microfilaria - WHO
Lymphatic filariasis is caused by thread-like parasitic worms, the filariae. The parasites belong to the species Wuchereria bancrofti, Brugia malayi and B. timori.

Macrofilaria - WHO
In their adult stage, filarial parasites live in the vessels of the lymphatic system, the network of nodes and vessels that maintains the fluid balance between the tissues and the blood, and which is an essential element of the body's immune defence system. The worms live for several years, producing millions of very small, immature larvae, microfilariae, that circulate in the peripheral blood with marked nocturnal periodicity.

Mosquito feeding - DBL
Many species of mosquitoes are responsible for the transmission of lymphatic filariasis; the most important vectors for W. bancrofti are Culex quinquefasciatus, Anopheles gambiae, Anopheles funestus, Aedes polynesiensis, Ae. scapularis and Ae. pseudoscutellaris. B. malayi is transmitted by various species of MansoniaAnopheles and Aedes. B. timori is transmitted by An. barbirostris.