Lab test
Hepatitis B Core Antibody Test – IgM Test – Hep B
Below is a plain-language overview of the hepatitis b core antibody test – igm test – hep b. This blood test looks for specific antibodies related to the hepatitis B virus. It helps identify recent or current hepatitis B infections.
What this test is
The Hepatitis B Core Antibody Test, specifically looking for IgM antibodies, is a blood test used to detect recent or current hepatitis B virus infection. These antibodies are produced by the body in response to the hepatitis B core antigen.
What it measures
- Hepatitis B Core Antibody, IgM — indicates a recent or current hepatitis B infection
What the test involves
This test requires a standard blood draw. A healthcare professional will collect a small sample of your blood, typically from a vein in your arm.
Why it is often ordered
Clinicians often order this test to help diagnose an acute (recent) hepatitis B infection. It can be used to determine if a person has a new or ongoing hepatitis B infection.
Preparation
You will need to follow the specific preparation instructions provided by the laboratory. This may include fasting or avoiding certain foods or medications before your blood draw.
How results are reported
Results are typically reported as detected or not detected, along with a qualitative interpretation. Reference ranges, which define what is considered normal, can vary between laboratories.
Before you go
- Fasting requirements
- Specific preparation instructions
- Test turnaround time
FAQ
Frequently asked questions
What is hepatitis B?
Hepatitis B is a viral infection that attacks the liver. It can be transmitted through blood, semen, or other body fluids. While many people recover, some can develop chronic hepatitis B, which can lead to serious liver problems.
How is hepatitis B transmitted?
Hepatitis B is spread when blood, semen, or other body fluids from an infected person enter the body of someone who is not infected. This can happen through sexual contact, sharing needles, or from an infected mother to her baby at birth.
What is the difference between Hepatitis B core antibody and Hepatitis B surface antibody?
The Hepatitis B core antibody (anti-HBc) indicates past or present infection. The IgM version specifically points to a recent infection. The Hepatitis B surface antibody (anti-HBs) typically indicates immunity, either from vaccination or recovery from a past infection.
Can this test detect chronic hepatitis B?
While this test is a strong indicator of acute infection, other hepatitis B markers are usually needed to diagnose chronic hepatitis B. A clinician will interpret these results in the context of your overall health and other test results.
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