Blood Tests That Predict Future Health Risks

Hepatitis B is a serious liver infection caused by the hepatitis B virus. This condition can range from a mild illness lasting a few weeks to a severe, lifelong disease. When someone is first infected, they have what doctors call acute hepatitis B. If the virus remains in the body for more than six months, the condition becomes chronic hepatitis B, which can lead to serious complications including liver damage, cirrhosis, liver cancer, and even liver failure.

Laboratory testing plays a crucial role in diagnosing and monitoring hepatitis B infection. The most common initial test is the hepatitis B surface antigen test, which can detect the presence of the virus in the blood. Additional tests include hepatitis B surface antibody, which indicates immunity either from vaccination or recovery from infection, and hepatitis B core antibody, which helps determine if an infection is current or past. For people with chronic hepatitis B, doctors may also order tests to measure viral load, which shows how much virus is present in the blood, and liver function tests to assess how well the liver is working.

People at higher risk for hepatitis B should consider getting tested. This includes individuals born in regions where hepatitis B is common, people who inject drugs, men who have sex with men, individuals with HIV infection, household contacts or sexual partners of someone with hepatitis B, people receiving dialysis, pregnant women, and healthcare workers exposed to blood. Testing is important because many people with hepatitis B have no symptoms, especially in the early stages of infection.

Understanding your test results is essential for proper management. A positive hepatitis B surface antigen test means you currently have the infection and can spread it to others. A positive surface antibody test indicates you are immune to hepatitis B, either from vaccination or past infection. Your healthcare provider will interpret your complete panel of tests to determine whether you have an acute infection, chronic infection, are immune, or have been vaccinated. Regular monitoring through laboratory tests helps doctors track the progression of the disease and determine the best treatment approach for those with chronic hepatitis B.