Biotin Supplements and Laboratory Test Interference

Hepatitis B is a viral infection that affects the liver and can cause both acute and chronic disease. The virus is transmitted through contact with infected blood or body fluids, including from mother to child during birth, through sexual contact, or by sharing contaminated needles. Many people with hepatitis B do not experience symptoms initially, which is why laboratory testing is crucial for diagnosis. When symptoms do occur, they may include fatigue, abdominal pain, loss of appetite, nausea, jaundice (yellowing of the skin and eyes), and dark urine.

Laboratory tests play a vital role in detecting hepatitis B infection and monitoring the disease. The most common screening test is the hepatitis B surface antigen (HBsAg) test, which detects proteins on the surface of the virus. A positive result indicates current infection. Additional tests include hepatitis B surface antibody (anti-HBs), which shows immunity either from vaccination or past infection, and hepatitis B core antibody (anti-HBc), which indicates past or current infection. For people with chronic hepatitis B, doctors may also order liver function tests, hepatitis B viral load tests to measure the amount of virus in the blood, and tests for liver damage.

Understanding test results requires knowledge of what each marker indicates. The presence of HBsAg for more than six months suggests chronic infection. Anti-HBs antibodies indicate immunity and protection against the virus. Anti-HBc antibodies can be either IgM (indicating recent infection) or IgG (indicating past infection). Healthcare providers use combinations of these markers to determine whether someone has an acute infection, chronic infection, has recovered from infection, or is immune due to vaccination.

Regular monitoring through laboratory tests is essential for people with chronic hepatitis B. These tests help healthcare providers assess liver health, determine if treatment is needed, and evaluate how well treatment is working. Tests may include measuring viral DNA levels, checking liver enzyme levels, and sometimes performing tests to assess the degree of liver scarring. Early detection and appropriate monitoring can help prevent serious complications such as cirrhosis and liver cancer, making laboratory testing an indispensable tool in managing hepatitis B.