An anti-D-immunoglobulin preparation implicated in a hepatitis non-A,non-B transmission was analyzed for the presence of a DNA, which was originally isolated, cloned and sequenced from feces of a patient with posttransfusion HNANB. The investigation was performed by a DNA polymerase chain reaction using synthetic oligoprimers. Commercially available immunoglobulin preparations served as controls. The demonstration of identical DNA sequences in the infectious material speaks in favour of this up to now unknown circular and partially double-stranded DNA to be a virus genome involved in hepatitis non-A,non-B.
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