Individual periods of contagiousness within clusters of HCV-infected MSM.

<p>The period of contagiousness, as defined in the material and methods section, is represented by a horizontal black line. HIV-positive and HIV-negative MSM infected by HCV are indicated by red and green circles, respectively.</p

Characteristics of MSM within clusters of HCV infection.

<p>Characteristics of MSM within clusters of HCV infection.</p

Phylogenetic trees of HCV NS5B sequences.

<p>Phylogenetic trees of NS5B sequences from HCV strains of genotype 1a (A) and 4d (B) isolated in this study including MSM and non-MSM patients. HCV sequences from HIV-positive and HIV-negative MSM are indicated by red and green circles, respectively. HCV sequences isolated in non-MSM patients and used for comparison are named NCH101-NCH120 for genotype 1a strains and NCH401-412 for genotype 4d strains. Reference strains for each subtype are identified by Genbank accession number. Identified transmission clusters and pairs are indicated by curly braces. Scale bars indicate nucleotide substitutions per site.</p

Characteristics of HIV-positive and HIV-negative MSM with HCV infection.

<p>Characteristics of HIV-positive and HIV-negative MSM with HCV infection.</p