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  2. HBsAg - Wikipedia

    en.wikipedia.org/wiki/HBsAg

    Today, these antigen-proteins can be genetically manufactured (e.g. transgene E. coli) to produce material for a simple antigen test, which detects the presence of HBV. It is present in the sera of patients with viral hepatitis B (with or without clinical symptoms). Patients who developed antibodies against HBsAg (anti-HBsAg seroconversion) are ...

  3. Hepatitis - Wikipedia

    en.wikipedia.org/wiki/Hepatitis

    In the case of hepatitis B, blood tests exist for multiple virus antigens (which are different components of the virion particle) and antibodies. [75] The combination of antigen and antibody positivity can provide information about the stage of infection (acute or chronic), the degree of viral replication, and the infectivity of the virus.

  4. Viral hepatitis - Wikipedia

    en.wikipedia.org/wiki/Viral_hepatitis

    Hepatitis A or infectious jaundice is caused by hepatitis A virus (HAV), a picornavirus transmitted by the fecal-oral route often associated with ingestion of contaminated food. It causes an acute form of hepatitis and does not have a chronic stage. A patient's immune system makes antibodies against HAV that confer immunity against future ...

  5. 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).

  6. Autoimmune hepatitis - Wikipedia

    en.wikipedia.org/wiki/Autoimmune_hepatitis

    A number of specific antibodies found in the blood (antinuclear antibody (ANA), anti-smooth muscle antibody (SMA), anti-liver kidney microsomal antibodies (LKM-1, LKM-2, LKM-3), anti soluble liver antigen (SLA), liver–pancreas antigen (LP), and anti-mitochondrial antibody (AMA)) are of use, as is finding an increased immunoglobulin G level.

  7. 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 ...

  8. 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]

  9. Laboratory diagnosis of viral infections - Wikipedia

    en.wikipedia.org/wiki/Laboratory_diagnosis_of...

    To do this, antibodies that are specific to different types of viruses are mixed with the tissue sample. After the tissue is exposed to a specific wavelength of light or a chemical that allows the antibody to be visualized. [citation needed] These tests require specialized antibodies that are produced and purchased from commercial companies.

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