Frequent lymphocytes infection by hepatitis B virus in haemophiliacs

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Abstract
We have tested the different mononuclear blood cell populations of seven patients with severe haemophilia and one patient with F VII deficiency for the presence of HBV DNA. These subjects were all polytransfused with non-heated coagulation factors; three were HBsAg positive, five HBsAg negative but anti-HBc and anti-HBs positive; HBV DNA sequences were detected in six subjects including three without detectable serum HBsAg. Furthermore the viral DNA sequences were identified in the T lymphocyte subpopulations (OKT4+ and/or OKT8+ cells). This observation suggests that HBV infection of lymphocytes might be related to the immunological disorders observed in these patients.