Fig. 2From: Update on the distribution of Mansonella perstans in the southern part of Cameroon: influence of ecological factors and mass drug administration with ivermectinRounds of mass drug administration programmes in years in M. perstans endemic areas in Cameroon. MDA rounds at the time of sampling in 2013: white = no treatment; pale blue = 4 years; mid-blue = 8 years MDA and dark blue = >10 years. Striped areas refer to sites of longitudinal survey where in, samples were obtained before MDA started and after either 8 (Nwa) or >10 (Mamfe) yearsBack to article page