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  2. HBsAg - Wikipedia

    en.wikipedia.org/wiki/HBsAg

    Patients who developed antibodies against HBsAg (anti-HBsAg seroconversion) are usually considered non-infectious. HBsAg detection by immunoassay is used in blood screening, to establish a diagnosis of hepatitis B infection in the clinical setting (in combination with other disease markers) and to monitor antiviral treatment.

  3. Hepatitis B - Wikipedia

    en.wikipedia.org/wiki/Hepatitis_B

    If the host is able to clear the infection, eventually the HBsAg will become undetectable and will be followed by IgG antibodies to the hepatitis B surface antigen and core antigen (anti-HBs and anti HBc IgG). [39] The time between the removal of the HBsAg and the appearance of anti-HBs is called the window period. A person negative for HBsAg ...

  4. Seroconversion - Wikipedia

    en.wikipedia.org/wiki/Seroconversion

    The presence of surface antibody (anti-HBs) indicates an individual with immunity to hepatitis B, whether due to previously resolved infection or due to hepatitis B vaccination. [65] For example, an individual who has never had any exposure to HBV, either by vaccine or by infection, would test negative for the entire serology panel.

  5. Hepatitis B virus - Wikipedia

    en.wikipedia.org/wiki/Hepatitis_B_virus

    HBsAg (hepatitis B surface antigen) was the first hepatitis B virus protein to be discovered. [15] It consists of small (S), medium (M) and large (L) protein. [16] HBcAg (hepatitis B core antigen) is the main structural protein of HBV icosahedral nucleocapsid and it has function in replication of the virus. [17]

  6. Hepatitis - Wikipedia

    en.wikipedia.org/wiki/Hepatitis

    Viral hepatitis is primarily diagnosed through blood tests for levels of viral antigens (such as the hepatitis B surface or core antigen), anti-viral antibodies (such as the anti-hepatitis B surface antibody or anti-hepatitis A antibody), or viral DNA/RNA. [17] [32] In early infection (i.e. within 1 week), IgM antibodies are found in the blood ...

  7. HBcAg - Wikipedia

    en.wikipedia.org/wiki/HBcAg

    HBcAg (core antigen) is a hepatitis B viral protein. [ 1 ] [ 2 ] It is an indicator of active viral replication; this means the person infected with Hepatitis B can likely transmit the virus on to another person (i.e. the person is infectious).

  8. Hepatitis B immune globulin - Wikipedia

    en.wikipedia.org/wiki/Hepatitis_B_immune_globulin

    HBIG is prepared from the plasma of donors who have high antibody levels of the hepatitis B surface antigen. It is extracted from the Cohn fraction II.During the process, viruses are deactivated, and in the final steps, solvents used in the preparation are removed.

  9. Vaccine-induced seropositivity - Wikipedia

    en.wikipedia.org/wiki/Vaccine-induced_seropositivity

    When a person gets a hepatitis B vaccine then the most common test for hepatitis B will show them to be positive. The usual course of action, in this case, is to give the person a panel of tests for HBsAg, anti-HBc, and anti-HBs (hepatitis B surface antigen, anti-hepatitis B core, and anti-hepatitis B surface). A person who has never been ...

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