Fig. 2From: Cross-watershed distribution pattern challenging the elimination of Oncomelania hupensis, the intermediate host of Schistosoma japonicum, in Sichuan province, ChinaGeographical distribution of 12 clades in seven watersheds. Five sub-regions based on genetic barriers are denoted by dashed circles with Arabic numerals. The colors and letters for haplotype clades are consistent with Fig. 1Back to article page