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. 2011 Oct 11;5(10):e1346. doi: 10.1371/journal.pntd.0001346

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Surveys in 70 villages sampled 6,489 adults for LF antigen in 1999 and 2000 (50–100 adult residents of each village) located in the 30 LGAs comprising Plateau and Nasarawa states. The map is color coded based on the mean antigen results (mean of the village means): shown in red are ten LGAs having a mean baseline antigen prevalence exceeding 25% that form a middle band stretching from southwest to northeast.