VSports - Abstract
A new wild-type isolate of Epstein-Barr virus (EBV) was identified in follow-up studies of a case of chronic active EBV infection in an 8-year-old girl who had high titres of antibody to viral capsid antigen and early antigen (EA) (greater than 20 480 and 2560 respectively), persistent splenomegaly and abnormal immunologic features. More than 10 throat washings from this patient failed to transform cord blood lymphocytes (CBL), but at least 7 were able to induce EA in Raji cells. Supernatants from cultures of the lymphoblastoid cell line obtained by in-vitro infection of this patient's leukocytes with the B95-8 strain of EBV revealed a herpesvirus particle when examined by electron microscopy. The same supernatants were unable to transform CBL but could induce EA in Raji cells upon superinfection. In 30 or more trials the patient's lymphocytes never transformed spontaneously but did become positive for EBV nuclear antigen and EA in the first week of culture at least twice V体育ios版. Parallel studies performed on the father of the patient yielded similar results. This, then, is the first report documenting lytic activity associated with a wild-type EBV isolate.
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