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Still, newer methods include an antibody test for the virus' core protein and the detection of the viral genome after first concentrating the viral particles by ultracentrifugation. [44] A form of infection with persistently moderately elevated serum liver enzymes but without antibodies to hepatitis C has also been reported. [45]
Current CDC recommendations are to begin with a test that screens for both antigen and antibody, then follow up with an immunoassay to differentiate between HIV-1 and HIV-2 antibodies. Non-reactive (negative) tests are followed up with nucleic acid tests for viral RNA. [27]
The National Donor Deferral Registry, also known as the (NDDR) is a database of individuals who have tested "reactive" for viral agents like human immunodeficiency viruses (HIV), Hepatitis B virus (HBV), and hepatitis C virus (HCV) and are permanently prohibited from donating plasma. [1]
Serology is the scientific study of serum and other body fluids.In practice, the term usually refers to the diagnostic identification of antibodies in the serum. [1] Such antibodies are typically formed in response to an infection (against a given microorganism), [2] against other foreign proteins (in response, for example, to a mismatched blood transfusion), or to one's own proteins (in ...
The hepatitis C virus (HCV) [3] is a small (55–65 nm in size), enveloped, positive-sense single-stranded RNA virus of the family Flaviviridae. The hepatitis C virus is the cause of hepatitis C and some cancers such as liver cancer ( hepatocellular carcinoma , abbreviated HCC) and lymphomas in humans.
Cross-reactivity, in a general sense, is the reactivity of an observed agent which initiates reactions outside the main reaction expected.This has implications for any kind of test or assay, including diagnostic tests in medicine, and can be a cause of false positives.
In the 1970s and 1980s, blood transfusions were a major factor in spreading hepatitis C virus. [31] Since widespread screening of blood products for hepatitis C began in 1992, the risk of acquiring hepatitis C from a blood transfusion has decreased from approximately 10% in the 1970s to 1 in 2 million currently. [17]
Autoimmune hepatitis, formerly known as lupoid hepatitis, plasma cell hepatitis, or autoimmune chronic active hepatitis, is a chronic, autoimmune disease of the liver that occurs when the body's immune system attacks liver cells, causing the liver to be inflamed.
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