Abstract
Infection with hepatitis delta virus (HDV) always occurs in association with hepatitis B virus (HBV) and is a cause of significant morbidity and mortality. We present a case of severe acute HDV infection superimposed on a previously unrecognized HBV infection, in which an interferon-sparing antiviral therapy consisting of tenofovir disoproxil fumarate (TDF) and lamivudine was initiated and subsequently maintained. Evidence of successful suppression of HDV ribonucleic acid (RNA) was obtained after 65 weeks of TDF-based treatment. This was mirrored by a significant reduction in the levels of HBV DNA and HBV surface antigen. HDV RNA subsequently rebounded after our patient stopped antiviral therapy of his own accord. Interferon-sparing TDF-based antiviral therapy was safe and effective in achieving HDV RNA suppression in acute HDV superinfection. Further research into the utility of interferon-sparing TDF-based regimes in the treatment of acute HDV infection is needed.
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