“…Transmission is also associated with other parenteral exposures, such as tattooing, ear or body piercing, surgery, acupuncture, haemodialysis, occupational needle-stick injuries and other health-care procedures (Alter, 1994;Alter et al, 1990). Although the efficiency of HCV transmission through sexual or household contact is not yet understood entirely (Luksamijarulkul et al, 2000;Romanowski et al, 2003), the observation of closely related HCV sequences obtained from infected couples or sexual partners could be interpreted as evidence of HCV sexual transmission (Capelli et al, 1997;Chayama et al, 1995;Halfon et al, 2001;Healey et al, 1995;Kao et al, 1992Kao et al, , 2000Komine et al, 1999;Nakayama et al, 2005;Quer et al, 2003;Rice et al, 1993;Romanowski et al, 2003;Ross et al, 1999;Thaikruea et al, 2004;Yagura et al, 2002).…”