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Related Experiment Videos

The emerging pattern of post-transfusion hepatitis.

H J Alter, P V Holland, R H Purcell

    The American Journal of the Medical Sciences
    |September 1, 1975
    PubMed
    Summary

    Screening blood donors for hepatitis B surface antigen (HBs Ag) significantly reduces post-transfusion hepatitis (PTH). Further testing with radioimmunoassay (RIA) identifies most residual hepatitis cases as unrelated to known hepatitis viruses.

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    Area of Science:

    • Hepatology
    • Virology
    • Transfusion Medicine

    Background:

    • Post-transfusion hepatitis (PTH) poses a significant risk in blood transfusions.
    • Hepatitis B surface antigen (HBs Ag) has been identified as a major cause of PTH.
    • Previous screening methods have reduced, but not eliminated, hepatitis transmission.

    Purpose of the Study:

    • To evaluate the effectiveness of enhanced screening for HBs Ag in reducing PTH.
    • To investigate the serological characteristics of residual hepatitis cases post-screening.

    Main Methods:

    • Exclusion of commercial and HBs Ag-positive donors using counterelectrophoresis.
    • Prescreening of voluntary donors for HBs Ag using solid-phase radioimmunoassay (RIA).
    • Serological testing to identify causative agents of residual hepatitis.

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    Main Results:

    • Exclusion of HBs Ag-positive donors markedly reduced PTH frequency.
    • RIA prescreening further reduced type-B PTH.
    • Approximately 90% of residual hepatitis cases were serologically unrelated to hepatitis A or B viruses.
    • Cytomegalovirus and Epstein-Barr virus were not implicated in non-A, non-B hepatitis.

    Conclusions:

    • Enhanced screening for HBs Ag, particularly using RIA, is highly effective in reducing transfusion-associated hepatitis.
    • A significant proportion of residual hepatitis is not caused by known hepatitis A or B viruses.
    • The existence of additional hepatitis viruses is suggested.