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. 2010 Jun;82(6):1079–1087. doi: 10.4269/ajtmh.2010.09-0702

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Copyright © 2010 by The American Society of Tropical Medicine and Hygiene

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Figure 3. — Semi-variograms and best-fitted lines of spatial models for soil-transmitted helminths Ascaris lumbricoides and Trichuris trichiura in A, Kenya; B, Uganda and northern Tanzania > 2° south; C, Uganda and northern Tanzania < 2° south; and D, Zambia; and hookworm in A, Kenya; B, Uganda and Tanzania; and C, Zambia. Vertical axis indicates semi-variance and horizontal axis indicates distance in decimal degrees. Range in kilometers was calculated assuming 1 decimal degree = 112 km at the equator.