Approximately 3,500 people will participate per year. The study population will include females and males over 5 years of age who live in filariasis endemic areas. The study will be performed in Indonesia in B. timori and W. bancrofti endemic areas over a period of 4 years. Participants will be studied only once in cross-sectional surveys. Some subjects may be included in more than one annual population survey, but this is not a longitudinal study. Purpose of the study is to evaluate different mass drug administration (MDA) regimens for lymphatic filariasis and also to study the impact of MDA on soil transmitted helminth infections (STH). MDA will administered by others (e.g., Ministry of Health). Results of this study may enhance efforts to control and eliminate these important neglected tropical diseases. The investigators will test the hypothesis that accelerated mass drug administration will be superior to annual MDA for elimination of lymphatic filariasis and for control of soil transmitted helminth infections (STH): 1. Compare the relative impact and cost effectiveness of annual vs. twice yearly mass drug administration (MDA) for elimination of lymphatic filariasis (LF). 2. Study the impact of annual vs. semiannual MDA on soil transmitted helminth (STH) infection in these populations.
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Prevalence of Microfilaria in Blood as Determined by Microscopy of Participant Blood
Timeframe: 3 years