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A 21-year-old female asked:

If you are hepatitis b reactive, and then you are test again for hbsag and the result is non reactive what does it mean? you don't have hbv?

1 doctor answer2 doctors weighed in
Dr. John Fung
General Surgery 39 years experience
Reactive to what?: Hbv markers are used to distinguish actively infected from immunity, the latter include antibody to surface antigen (hbsab) and to the core antigen (hbcab). Some tests detect part of the virus, such as surface antigen (hbsag), the core antigen, or hbv dna. The presence of hbsag indicates that the person is potentially infectious. Hbsab replaces hbsag as the hbv infection evolves to immunity.

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Similar questions

A 40-year-old member asked:

What to do if I cannot join with hepatitis b. I have hbsag. does that mean I have hepatitis?

1 doctor answer2 doctors weighed in
Dr. Ed Friedlander
Pathology 44 years experience
Become informed: I am going to assume you are a lifelong hepatitis B carrier. Nowadays in the era of immunization it makes little sense to exclude you from military service or some other career path because of your status; you do need lifelong health care to prevent complications and they probably don't want to spend the extra money. Find some other career you can enjoy and learn about your situation.
A 39-year-old member asked:

Hbsag non reactive but should I recheck for hepa b test?

1 doctor answer1 doctor weighed in
Dr. Joel Gallant
Infectious Disease 36 years experience
Check for immunity: Hbsag (surface antigen) tests for active hepatitis. If it's negative, you don't have it and don't need retesting unless you get exposed. However, you should get a hbsab (surface antibody) to see if you're immune. If the antibody is negative, you should be vaccinated, and then you'll never need to worry about getting hepatitis b.

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Last updated Sep 6, 2014

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