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A Linearized phylogenetic tree of the ten M. ulcerans haplotypes (HT1–10) detected in the Densu River Valley of Ghana (MEGA software version 4.1 (beta), scale: number of differences at the 89 SNP loci tested). B Schematic overview of reference (0) and SNP (1) alleles present in the sequence of the ten M. ulcerans haplotypes, which can be identified by TSP assays 1, 3, 4, 6, 8, 9, 15, 16, 17 and 18.
