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Related Experiment Videos

e-Antigen: a link between immune response and infectivity in hepatitis B?

G C Turner, H T Green, V D Blundell

    The Journal of Hygiene
    |December 1, 1978
    PubMed
    Summary

    Hepatitis B e-antigen positivity indicates a defective immune response, leading to higher viral replication and increased infectivity in carriers. Monitoring e-antigen status is crucial for assessing hepatitis B transmission risk.

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    Area of Science:

    • Hepatology
    • Immunology
    • Virology

    Background:

    • Hepatitis B virus (HBV) infection is a significant global health concern.
    • Hepatitis B surface antigen (HBsAg) is a key marker for HBV infection.
    • The role of e-antigen and anti-e in HBV infection dynamics and transmission requires further elucidation.

    Purpose of the Study:

    • To investigate the distribution and significance of hepatitis B e-antigen (HBeAg) and anti-HBe in individuals positive for HBsAg.
    • To correlate HBeAg status with disease progression, immune status, and infectivity in hepatitis B patients.

    Main Methods:

    • Analysis of HBeAg and anti-HBe status in blood samples from HBsAg-positive subjects.
    • Correlation of HBeAg presence with clinical presentation (acute vs. chronic infection).

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  • Assessment of HBeAg incidence in immunocompromised individuals and its association with HBsAg titres.

    • Main Results:

    • HBeAg was detected in all acute hepatitis B patients during the incubation period, decreasing significantly after illness onset.
    • Persistence or reappearance of HBeAg in chronic HBsAg carriers correlated with high HBsAg titres.
    • HBeAg was frequently observed in conditions associated with depressed cell-mediated immunity, such as Down's syndrome and chronic renal failure.
    • The majority of HBsAg carriers identified as infection sources were HBeAg-positive.

    Conclusions:

    • HBeAg positivity is linked to a deficient immune response to HBV, promoting viral replication and high HBsAg titres.
    • HBeAg-positive individuals exhibit a greater likelihood of transmitting HBV infection.
    • HBeAg/anti-HBe status is an important factor in assessing infectivity and guiding immunization strategies for hepatitis B control.