This manual is intended to guide the coordinated implementation of regular, systematic, large-scale interventions that provide anthelminthic drug treatment as a core component of the joint and synergic control of helminthic diseases such as lymphatic filariasis, onchocerciasis, schistosomiasis and soil-transmitted helminthiasis. While it is a general document, intended to be applicable in all epidemiological situations, it is specific in that it deals only with drugs and their coordinated use: it does not cover any of the other important public health interventions - health education, sanitation, safe water supply, vector control, etc. - needed to ensure sustained reduction in transmission, and then elimination, of helminthiasis. It will be the responsibility of programme managers to adapt this manual to the prevailing regional, national and local context and the resources available, and to build the preventive chemotherapy component into more comprehensive control or elimination strategies already in place or planned for the future.
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