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Table 1 STH prevalence values (any infection) in infected source villages used in simulations. The prevalence values are achieved by setting the basic reproductive number R0 and k (the shape parameter of the negative binomial distribution that describes the aggregation of parasites among hosts). The parameters required to achieve a desired prevalence value vary by species, because other parameters, for example, the worm life expectancy and transmission age structure, also differ by species

From: Human population movement can impede the elimination of soil-transmitted helminth transmission in regions with heterogeneity in mass drug administration coverage and transmission potential between villages: a metapopulation analysis

Prevalence A. lumbricoides Hookworm
Levela Value (%) R0 k R0 k
High 60–70 3.5 0.8 2 0.35
Medium 25–30 2.5 0.08 1.7 0.1
Low < 20 2 0.04 1.6 0.05
  1. aWHO risk categories based on prevalence for comparison [34]: high: > 50%; medium: 20–50%; low: < 20%