Fig. 6From: Cross-watershed distribution pattern challenging the elimination of Oncomelania hupensis, the intermediate host of Schistosoma japonicum, in Sichuan province, ChinaSnail habitats in major plains in study area. The middle sector shows the topography of study area and the plain areas with slope less than 0.94°. The right and left sectors denote the two major plains (right, larger and left, smaller)Back to article page