Australia Antigen (HBsAg) Test

The Australia antigen test, also known as the Hepatitis B surface antigen (HBsAg) test, is a blood test used to detect the presence of the HBsAg protein in the bloodstream. HBsAg is a surface protein of the Hepatitis B virus (HBV) and is the earliest indicator of a current HBV infection. The Australia antigen test is an essential diagnostic tool for detecting acute or chronic Hepatitis B infections. An active HBV infection can lead to liver inflammation and potentially result in chronic liver disease or other complications if left untreated. The test is used to screen individuals at risk of Hepatitis B, such as healthcare workers, pregnant women, and those with a history of intravenous drug use or high-risk sexual behaviour.