Fig. 2From: The preparatory phase for ground larviciding implementation for onchocerciasis control in the Meme River Basin in South West Cameroon: the COUNTDOWN Consortium alternative strategy implementation trialDosage-mortality regression curve of concentrations. The control mortality was set to a concentration of 0.0001Â mg/l as taking a logarithm of 0 is undefinable. The Hill slope (steepness of curve) was not constrained and included the control mortalityBack to article page