Quick Answer: How Accurate Is HBsAg Test?

What is the normal range of HBsAg?

Laboratory tests The dynamic range of HBsAg levels was 0.05-250 IU/mL..

Can you recover from hepatitis B?

Most adults with hepatitis B recover fully, even if their signs and symptoms are severe. Infants and children are more likely to develop a chronic (long-lasting) hepatitis B infection. A vaccine can prevent hepatitis B, but there’s no cure if you have the condition.

What can cause a false positive for hepatitis B?

Heterophilic antibodies have been known to cause both falsely positive (e.g. human immunodeficiency virus)4 and falsely elevated (e.g. prostate-specific antigen)5 immunoassay results.

How long can you have hep B without knowing?

Many people with Hepatitis B have no symptoms and do not know they are infected. If symptoms occur with acute infection, they usually appear within 3 months of exposure and can last anywhere from 2–12 weeks. Symptoms of chronic Hepatitis B can take up to 30 years to develop.

How long does hepatitis B take to kill?

Approximately 90% of healthy adults who are infected will get rid of the virus and develop protective antibodies against HBV – this can take up to six months.

What is the treatment of HBsAg positive?

Several antiviral medications — including entecavir (Baraclude), tenofovir (Viread), lamivudine (Epivir), adefovir (Hepsera) and telbivudine (Tyzeka) — can help fight the virus and slow its ability to damage your liver. These drugs are taken by mouth. Talk to your doctor about which medication might be right for you.

Can a hepatitis B test be wrong?

If the “HBsAg” was positive, this means that you are either chronically infected with hepatitis B or were recently infected. If only the “anti-HBc” was positive, it is most likely that you either had a “false-positive” test or are immune to hepatitis B infection (had hepatitis B infec- tion sometime in the past).

What does it mean if HBsAg is negative?

Normal results are negative or nonreactive, meaning that no hepatitis B surface antigen was found. If your test is positive or reactive, it may mean you are actively infected with HBV. In most cases this means that you will recover within 6 months.

Can HBsAg become negative after treatment?

Although HBsAg levels remain unchanged during lamivudine (LMV) treatment, recent studies report an association between a reduction of serum HBsAg level and viral suppression after entecavir (ETV) treatment. 3,4,5 However, these studies involved treatment-naïve patients with CHB.

How common is a false positive hepatitis B?

The administration of HBV and HBsAg test was performed simultaneously. The lab reported three cases of HBsAg positivity, a false positive result of 2.56%. Repeat testing after one week for HBsAg was negative for the three cases.

How accurate is hepatitis B test?

The pooled sensitivity and specificity were 90.0% (95% CI: 89.1, 90.8) and 99.5% (95% CI: 99.4, 99.5) respectively, but accuracy varied widely among brands. Accuracy did not differ significantly whether serum, plasma, venous or capillary whole blood was used.

What happens if HBsAg is positive?

A positive HBsAg test result means that you are infected and can spread the hepatitis B virus to others through your blood. anti-HBs or HBsAb (Hepatitis B surface antibody) – A “positive” or “reactive” anti-HBs (or HBsAb) test result indicates that a person is protected against the hepatitis B virus.