Fig. 5a–dFrom: Soil-transmitted helminths and schistosome infections in Ethiopia: a systematic review of progress in their control over the past 20 years Reported prevalence and intensity. The relationship between reported prevalence and arithmetic intensity for AL (a), TT (b), HW (c), SM (d). The negative binomial model is shown fitted for the arithmetic mean, and the estimated negative binomial parameter (aggregation parameter; k) value is shown on the upper right-hand side of each plot. Note all plots show a range of prevalence of 0 to 100%, whilst the eggs per gram (epg) range varies for each parasite. For other abbreviations, see Figs. 2Back to article page