Fig. 3.

Phylogenetic tree of the genus Echinococcus obtained by maximum likelihood analysis. Phylogram inferred from the concatenated nucleotide sequences of the mitochondrial cox1 and nad1 genes. The scale bar represents the estimated number of nucleotide substitutions per nucleotide site. Nam = Namibia, Ita = Italy, Ger = Germany, UK = United Kingdom. For haplotype letters (A–F) see Table 2. For accession numbers of sequences used for species other than E. equinus see text.