Human T-cell lymphotropic virus-I (HTLV-I) is a member of  Retroviridae family, Oncovirinae subfamily. The vast majority of persons infected with HTLV-I (~95%) DO NOT DEVELOP ANY significant DISEASE due to this virus. A small minority, about 1 person in 20, will develop disease; however this usually occurs only after several decades of infection. In very small minority of infected subjects, the virus is associated with two important human diseases: adult T-cell ...