The distribution of Bancroftian filariasis in Africa.

Bancroftian filariasis is widespread in Africa in the region between the Sahara Desert to the north and the Zambesi river to the south, and is also found in Egypt. It occurs in hot damp areas near the coasts, along the great rivers, and around the great lakes.The chief insect vectors seem to be Anopheles gambiae and A. funestus. Culex fatigans has been found to be a poor vector in most parts of Africa.An annex gives certain additional information not available at the time of preparation of the main review.