Quick Answer
Hepatitis B surface antibody quantitative, or surf ab quant, is a blood test that measures antibodies against the hepatitis B surface antigen; it is reported in mIU/mL. A result of 10 mIU/mL or higher generally means protection against hepatitis B, while a lower result such as 3.1 usually means no reliable protection. This test concerns hepatitis B only, not hepatitis A or C.
- Surf ab is short for hepatitis B surface antibody.
- Quant means quantitative, so the result is a number, not just positive or negative.
- The test checks immunity from vaccination or past hepatitis B infection.
- A level below 10 mIU/mL is usually considered not protective, per CDC.
- Low results may lead to revaccination or more testing, depending on history.
- It does not test for hepatitis A or hepatitis C.
Context Most Pages Skip
For hepatitis B, the immune system makes surface antibodies when a person responds to vaccination or clears an infection. These antibodies stick to the virus's outer surface protein and can block it from infecting liver cells. A quantitative test counts how much of that antibody is present, which helps clinicians judge whether the immune defense is likely strong enough. The result is not a diagnosis by itself. It is read alongside other markers, such as hepatitis B surface antigen and core antibody, because the same antibody level can mean different things depending on a person's vaccination and infection history.
Frequently Asked Questions
What is hepatitis b surf ab?
Hepatitis B surface antibody quantitative, or surf ab quant, is a blood test that measures antibodies against the hepatitis B surface antigen; it is reported in mIU/mL. A result of 10 mIU/mL or higher generally means protection against hepatitis B, while a lower result such as 3.1 usually means no reliable protection. This test concerns hepatitis B only, not hepatitis A or C.
What does hepatitis b surf ab quant 3 1 mean?
Hepatitis B surface antibody quantitative, or surf ab quant, is a blood test that measures antibodies against the hepatitis B surface antigen; it is reported in mIU/mL. A result of 10 mIU/mL or higher generally means protection against hepatitis B, while a lower result such as 3.1 usually means no reliable protection. This test concerns hepatitis B only, not hepatitis A or C.
What does hepatitis b surf ab quant low mean?
Hepatitis B surface antibody quantitative, or surf ab quant, is a blood test that measures antibodies against the hepatitis B surface antigen; it is reported in mIU/mL. A result of 10 mIU/mL or higher generally means protection against hepatitis B, while a lower result such as 3.1 usually means no reliable protection. This test concerns hepatitis B only, not hepatitis A or C.
What does hepatitis b surf ab quant mean?
Hepatitis B surface antibody quantitative, or surf ab quant, is a blood test that measures antibodies against the hepatitis B surface antigen; it is reported in mIU/mL. A result of 10 mIU/mL or higher generally means protection against hepatitis B, while a lower result such as 3.1 usually means no reliable protection. This test concerns hepatitis B only, not hepatitis A or C.
What does low hepatitis b surf ab quant mean?
Hepatitis B surface antibody quantitative, or surf ab quant, is a blood test that measures antibodies against the hepatitis B surface antigen; it is reported in mIU/mL. A result of 10 mIU/mL or higher generally means protection against hepatitis B, while a lower result such as 3.1 usually means no reliable protection. This test concerns hepatitis B only, not hepatitis A or C.
Related Questions
Sources & Further Reading
- CDC — Sexually Transmitted Infections
- CDC STI Treatment Guidelines
- WHO — Sexually transmitted infections fact sheet
- MedlinePlus — Sexually Transmitted Diseases
Figures reflect CDC surveillance and WHO estimates; they are population statistics, not personal risk predictions.