Abstract
FILARIASIS in the Philippine Islands is endemic in certain areas of the Bicol Peninsula of Luzon, in the neighbouring islands of Samar and Leyte, and in Mindanao, where there are extensive plantations of abaca1. Here, the principal vector is Aedes poicilius, which breeds in the leaf axils especially of abaca and banana trees2. Baisas3 found that in some communities of Sorsogon in the Bicol Peninsula, Culex fatigans was assuming its classic role as a vector of W. bancrofti in tropical urban environments. Our survey of 1954–551 showed that there was more to the epidemiology of filariasis in the Philippine Islands than that based on transmission by A. poicilius and C. fatigans, in that we obtained evidence of non-urban foci of infection in the absence of abaca. One of these was in Mountain Province, Luzon, and the other in the forests of the Island of Palawan.
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