Hbsag blood test

Understanding Your Test Results Understanding your hepatitis B blood tests can be confusing. It is important to talk to your health care provider so you understand your test results and your hepatitis B status. Are you infected? Protected? Or at risk? Below is a chart with the most common explanation of the test results, but unusual test results can occur. Please note that this chart is not intended as medical advice, so be sure to talk to your health care provider for a full explanation and obtain a printed copy of your test results. In some cases, a person could be referred to a liver specialist for further evaluation. More Detailed Information About Hepatitis B Blood Tests An acute hepatitis B infection follows a relatively long incubation period - from 60 to 150 days with an average of 90 days. It can take up to six months, however, for a person to get rid of the hepatitis B virus. And it can take up to six months for a hepatitis B blood test to show whether as person has recovered from an acute infection or has become chronically infected . The following graphic from the U.S. Centers for Disease Control and Prevention (CDC) represents the typical course of an acute hepatitis B infection from first exposure to recovery. Source: Centers for Disease Control and Prevention Video According to the CDC, a hepatitis B blood test result (or serologic marker) varies depending on whether the infection is a new acute infection or a chronic infection. • HBsAg (hepatitis B surface ...

The hepatitis B titer test can reveal whether you’re immune to the virus, either because of vaccination or previous exposure. It requires a simple blood draw. Titer tests measure antibodies in your blood. Antibodies are proteins produced by your immune system in response to foreign substances like viruses, bacteria, or chemicals. A hepatitis B titer test specifically looks for antibodies that suggest that you’re immune from the hepatitis B virus. Keep reading to learn more about hepatitis B titer tests including what they’re used for, what the results mean, and what to expect during the test. A hepatitis B Hepatitis B can develop into a chronic (or long-term) infection. Chronic infection occurs when your body can’t fight off the virus within Hepatitis B titer tests can be used to evaluate: • whether a high-risk person is immune to hepatitis B • whether hepatitis B immunoglobulin is needed after a needle prick • whether a person needs a • immunity after vaccination The • infants born with a mother with hepatitis B • pregnant women • people with • blood and tissue donors • people with end-stage • people taking • people living with or having sex with a person with hepatitis B • people with • people injecting drugs • men who have sex with men • people born in countries with a hepatitis B prevalence greater than 2 percent • people born in the United States not vaccinated as children and with parents born in regions with more than 8 percent hepatitis B prevalence You may need yo...

Hepatitis B Blood Tests The “Hepatitis B Panel” of Blood Tests Only one sample of blood is needed for a hepatitis B blood test, but the “Hepatitis B Panel” includes three parts. All three test results are needed to fully understand whether a person is infected or not. Below is an explanation of the 3-part “Hepatitis B Panel” of blood test results. • HBsAg (Hepatitis B surface antigen) - A "positive" or "reactive" HBsAg test result means that the person is infected with hepatitis B. This test can detect the actual presence of the hepatitis B virus (called the “surface antigen”) in your blood. If a person tests “positive,” then further testing is needed to determine if this is a new “acute” infection or a “chronic” hepatitis B infection. 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. This protection can be the result of receiving the hepatitis B vaccine or successfully recovering from a past hepatitis B infection. This test is not routinely included in blood bank screenings. A positive anti-HBs (or HBsAb) test result means you are “immune” and protected against the hepatitis B virus and cannot be infected. You are not infected and cannot spread hepatitis B to others. • anti-HBc or HBcAb (Hepatitis B core antibody) - A "pos...

HBsAg surrounds HBcAg and is part of the "envelope" that protects the virus from attack by the body's immune system. However, the immune system is good at getting through this envelope in order to kill the virus. When it does, remnants of surface antigen protein are left in the blood-like debris, which lab tests can detect. • Hepatitis B surface antibody (anti-HBs): This test indicates immunity from HBV infection, either due to recovery after an infection or from vaccination. • Total antibody to hepatitis B core antigen (anti-HBc): This test measures antibodies that show if you have ever had an active HBV infection. Anti-HBc appears at HBV infection onset and persists for life. • IgM antibody to hepatitis B core antigen (IgM anti-HBc): This test shows whether an acute HBV infection has occurred in the past six months. • Avoid sharing personal hygiene products such as toothbrushes, razors, or medical equipment (like a lancet or • Do not use IV drugs or share needles or drug-preparation equipment. • Make sure only new or sterilized needles are used during tattoos or body piercings. • Only use a licensed provider for cosmetic injections. • Use • Wear disposable gloves if you come in contact with blood or open wounds. • Centers for Disease Control and Prevention. • Conners EE, Panagiotakopoulos L, Hofmeister MG, et al. MMWR Recomm Rep. 2023;72(1):1-25. doi:10.15585/mmwr.rr7201a1 • Wilkins T, Sams R, Carpenter M. Am Fam Physician. 2019;99(5):314-323. • U.S. National Library of ...

Confirmation of positive results is performed as indicated, by a neutralization assay at no additional charge. • Samples with an index value greater than an established threshold and with positive results for other hepatitis B markers are considered positive for Hepatitis B Surface Antigen without further testing (neutralization testing is not performed). • Samples with an index value greater than an established threshold but with no other positive results for hepatitis B markers, or with an index value less than an established threshold but above the cutoff for positivity, are confirmed by neutralization. This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample. This assay can be used in conjunction with other serological and clinical information to diagnose individuals with acute or chronic hepatitis B infection. This assay may also be used to screen for hepatitis B infection in pregnant women to identify neonates who are at risk of acquiring hepatitis B during the perinatal period. Patients who are negative for HBsAg may still have acute type B viral hepatitis. There is sometimes a “core window” stage when HBsAg has become negat...

3 - 6 days Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary. Draw blood in either a serum gel tube, a PPT™ or a lavender-top (EDTA) tube and centrifuge. If tube other than a gel-barrier tube is used, transfer separated serum or plasma to a plastic transport tube (not a "pop-top" or "snapcap"). Specimen must be refrigerated immediately and frozen within 3 hours of collection. Quantitative HBV surface antigen (HBsAg) testing is intended for use in individuals with a confirmed diagnosis of Hepatitis B Virus infection based on positive HBsAg, Anti-HBs antibody and/or Anti-core antigen (anti-HBc) antibody test results. Quantitative HBsAg testing has utility in assessing HBV replication in the absence and presence of antiviral therapy, which may inform monitoring treatment response and relapse in the setting of initial and prolonged antiviral therapy, respectively. Recent studies indicate that rapid decay and loss of HBsAg expression are strong predictors of sustained HBV clearance. Quantitative HBsAg testing is not intended for the diagnosis of HBV infection. The relationship between HBsAg levels and ongoing HBV replication and/or persistent infection has not been fully defined. HBV DNA viral load measurements reflect the extent of ongoi...