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Related Experiment Videos

Positive direct antiglobulin test in normal individuals

D W Gorst, V I Rawlinson, A H Merry

    Vox Sanguinis
    |February 1, 1980
    PubMed
    Summary

    A positive direct antiglobulin test (DAT) was found in 65 healthy blood donors. This finding correlated with increasing age, but few developed autoimmune hemolytic anemia.

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    Area of Science:

    • Immunology
    • Hematology
    • Blood Transfusion

    Background:

    • The direct antiglobulin test (DAT) detects antibodies or complement attached to red blood cells.
    • A positive DAT is often associated with various clinical conditions, including hemolytic anemia.
    • The significance of a positive DAT in otherwise healthy individuals is not well understood.

    Purpose of the Study:

    • To investigate the prevalence and characteristics of a positive direct antiglobulin test (DAT) in healthy blood donors.
    • To determine if any specific factors are associated with a positive DAT in this population.
    • To assess the long-term clinical outcomes of healthy individuals with a positive DAT.

    Main Methods:

    • Retrospective analysis of blood donor data over 14 years.
    • Identification of individuals with a positive DAT.
    • Recalling a subset of these individuals for detailed clinical and laboratory evaluation.
    • Correlation analysis with age and other potential confounding factors.

    Main Results:

    • 65 healthy blood donors with a positive DAT were identified.
    • A significant positive correlation was observed between a positive DAT and increasing age.
    • No specific cause for the positive DAT was identified in most healthy individuals.
    • Only one individual developed autoimmune hemolytic anemia during the study period.

    Conclusions:

    • A positive direct antiglobulin test (DAT) can be found in healthy blood donors.
    • Increasing age is a significant factor associated with a positive DAT in healthy individuals.
    • A positive DAT in healthy donors is generally not indicative of impending autoimmune hemolytic anemia.

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