This test looks for antibodies in your blood called IgM. The test can find out whether you are infected with the hepatitis A virus (HAV).Your immune system makes IgM antibodies when you are first infected with HAV. It can take 14 to 50 days to develop symptoms of hepatitis A after you become infected. The average time to get symptoms after you are infected is 30 days. IgM antibodies usually begin to appear in your blood 5 to 10 days before you start having symptoms and can stay in your blood for about 6 months after the infection.
Having a blood test with a needle carries some risks. These include bleeding, infection, bruising, and feeling lightheaded. When the needle pricks your arm or hand, you may feel a slight sting or pain. Afterward, the site may be sore.
Test results may vary depending on your age, gender, health history, the method used for the test, and other things. Your test results may not mean you have a problem. Ask your healthcare provider what your test results mean for you.
Normal results are negative, meaning that you don't have the hepatitis A IgM in your blood.
If your test is positive or reactive, it may mean:
You have an active HAV infection
You have had an HAV infection within the last 6 months