Anti-HCV / Hepatitis C Antibody

Anti-HCV detects antibodies to hepatitis C virus. A reactive antibody result does not by itself confirm an active infection; follow-up testing may be required according to clinical guidance. Results should be discussed with a healthcare professional.

An anti-HCV test looks for antibodies produced after exposure to hepatitis C virus. A nonreactive antibody result usually means no HCV antibodies were detected, but very recent exposure may not yet be detectable. A reactive antibody result does not prove that active virus is still present.

CDC recommends HCV RNA testing after a reactive antibody result to identify current infection. A person can remain antibody-positive after a past infection has cleared, so the RNA result is what distinguishes current viraemia from resolved infection in most cases.

The preferred hepatitis C testing pathway links antibody screening to HCV RNA testing when the antibody is reactive. Some laboratories can perform the RNA test automatically on the same sample (‘reflex’ testing), reducing the chance that a person with a reactive screen is lost before confirmation. A person who has previously cleared hepatitis C or been successfully treated can remain antibody positive, so repeating Anti-HCV does not show whether virus is still present. HCV RNA is the test used to identify current viraemia.

Anti-HCV is an antibody screening test used to look for exposure to hepatitis C. A reactive antibody test does not by itself prove current active infection; confirmatory viral testing is generally required.

Anti-HCV is an antibody screening test. A nonreactive result usually means hepatitis C antibodies were not detected, although very recent exposure may precede detectable antibodies. A reactive antibody result means antibodies have been detected, but it cannot distinguish a current infection from a past infection that has cleared. CDC recommends follow-up HCV RNA testing to determine whether current infection is present.

For this reason, a reactive Anti-HCV result should not be presented as a final diagnosis of active hepatitis C without the appropriate RNA result.

Anti-HCV is not a viral-load test and cannot show how much virus is present or whether liver damage has occurred. False-reactive screening results can occur, and early infection can be antibody-negative. HCV RNA and, when relevant, liver assessment are separate parts of evaluation.

A blood sample is used and fasting is not required. If anti-HCV is reactive, the next step is generally HCV RNA testing. Where available, reflex RNA testing can reduce the need for a second visit.