Description
Detect early or active infection with the hepatitis A virus
The Hepatitis A IgM antibody test is a blood test used to determine whether a person has a recent or current infection with the hepatitis A virus (HAV). It specifically measures IgM (immunoglobulin M) antibodies, which are the first type of antibody the body produces in response to an infection.
Why the Hepatitis A IgM Test Is Important
This test is commonly used to:
- Diagnose an active hepatitis A infection
- Evaluate symptoms such as jaundice, abdominal pain, fatigue, or dark urine
- Screen individuals with known exposure to HAV (through food, travel, or close contact)
- Prevent outbreaks by identifying contagious individuals early
What a Positive Result Means
A positive Hepatitis A IgM result typically means that:
- The person has a recent or current infection with hepatitis A
- They may be contagious and should take precautions to prevent spreading the virus
- Further medical evaluation or monitoring may be needed
IgM antibodies usually appear within 2 to 3 weeks after exposure and remain detectable for 3 to 6 months.
What a Negative Result Means
A negative result generally indicates:
- No current or recent infection
- The person may have never been exposed, or is in the early incubation phase before antibodies have developed
- Follow-up testing or checking for IgG antibodies may be needed to assess past exposure or immunity
Fasting: Not required
