Figure 2.

Phylogenetic tree of NS5A region (codon 1973-2419) of amino acids HCV variants obtained from ten patients at different time of treatment. D0: beginning of the treatment; M3: 3 mo of treatment; SVR: Sustained Virological Responders to IFN-ribavirin therapy; NR: Non-Responders to IFN-ribavirin therapy. HCV-H strain was used as outgroup. The internal node numbers represent the bootstrap values. Distance scale represents 2% of difference between sequences. When all NS5A sequences within a patient at one time point of treatment are grouped in a cluster, this cluster is presented by only one node.