Figure 1

Maximum-likelihood phylogenetic tree derived from the alignment of 341 base pairs of the 5’ UTR of the Hepatitis C virus detected in non-injecting drug users in Pará, eastern Amazon. The topological robustness of the tree was evaluated using a bootstrap analysis with 1,000 replicates (bootstrap values of less than 50 are not shown). Drug users selected in this study can be identified by DU sample number (+ number of sequences representing).