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[Acquired B antigen: a new case].

A Pradalier, J J Pailleret, D Janvier

    Annales De Medecine Interne
    |January 1, 1982
    PubMed
    Summary
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    An acquired B antigen was identified in an 86-year-old woman due to an Escherichia coli urinary infection. The antigen disappeared after treating the infection, highlighting a reversible blood group alteration.

    Area of Science:

    • Hematology
    • Clinical Microbiology

    Background:

    • Blood group determination is crucial for transfusion safety.
    • Acquired B antigen is a rare phenomenon that can mimic true B blood groups.

    Observation:

    • An 86-year-old woman with an Escherichia coli urinary infection presented with an abnormal blood group determination.
    • Her blood group changed from A to exhibiting an acquired B antigen.

    Findings:

    • The acquired B antigen resolved within three months following successful treatment of the urinary infection.
    • This suggests a direct link between the bacterial infection and the transient blood group alteration.

    Implications:

    • This case underscores the importance of considering infections as a cause of acquired B antigen.

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  • Accurate diagnosis and management of underlying infections are essential to correct such blood group discrepancies.