Have you recently been exposed to HIV, hepatitis B, or hepatitis C and want to check your infection status? Please note, if there’s a chance you’ve recently been exposed to HIV or hepatitis, you should attend A&E as soon as possible (and within 72 hours of exposure) for consideration of post-exposure prophylaxis (PEP) or a hepatitis B vaccination. If you have symptoms, please see your GP or attend A&E if you’re very unwell.
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Biomarker Table
Hiv
HIV-1 and HIV-2 antibodies and P24 antigen
HIV antibodies are made by the immune system in response to infection with either Human Immunodeficiency Virus type 1 or 2. P24 antigen is a protein from the core of the HIV virus, it is found during the initial infection with HIV and disappears following seroconversion. This test will look for the presence of HIV antibodies and p24 antigen in the blood and will report whether they are detected or not.
Immunity
Hepatitis C antibodies
Hepatitis C is a virus that can infect and damage the liver. It is mainly transmitted through sharing needles while injecting drugs, through unprotected sex with an infected person and can also be passed from mother to baby. Many who are infected with the virus are unaware as there are often no noticeable symptoms. However, a chronic hepatitis C infection can cause cirrhosis (scarring of the liver) which can lead to chronic liver disease. Hepatitis C antibodies are produced by the body in response to exposure to the hepatitis C virus (HCV). Testing for these antibodies in the blood helps to identify a hepatitis C infection.
Infection
Hepatitis B surface antigen
The hepatitis B surface antigen (HBsAg) is a protein on the surface of the hepatitis B virus, present in the blood during a hepatitis B virus infection. Checking for this surface antigen helps to identify acute and chronic HBV infections. Positive surface antigen meaning the virus is present and that the individual is infectious.