What is the pre-S1 antigen of hepatitis B?

Patient's question:

Hepatitis B surface antigen positive, Hepatitis B E antibody, Hepatitis B core antibody, S1 antigen positive
Hello doctor, what should I do in this situation? In my liver function test, only direct bilirubin is 7.3 (normal value: 1.7-6.8), and the ultrasound is normal.

Doctor's answer:

Your current description shows positive for hepatitis B surface antigen, hepatitis B E antibody, and hepatitis B core antibody, which aligns with the pattern of "minor triple positive" in hepatitis B. You don't need to worry about it; treatment is not necessarily required. The S1 antigen is an indicator of transmissibility. It is also a surface antigen protein, so you should still decide whether to seek treatment based on your liver function test results. Not all hepatitis B carriers need treatment. Your liver function is good, and your bilirubin levels are not high, so treatment is not needed. Please avoid alcohol, overtime work, and antibiotics, as hepatitis poses significant harm to patients. Once you notice any symptoms, seek medical attention promptly.