Serum IgG Antibody to Mycoplasma pneumoniae (IgG)

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you’ve had symptoms like cough, fever, or chest pain that could suggest a respiratory infection caused by *Mycoplasma pneumoniae*. It’s also used to confirm a diagnosis when other tests are inconclusive or if you’ve had symptoms for a while.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The process takes a few minutes, and you can return to your normal activities afterward. If you’re on blood-thinning medication or have bleeding disorders, let your provider know before the test.

What the Test Results Mean

A positive result indicates your immune system has likely encountered *Mycoplasma pneumoniae* before, meaning you’ve had an infection at some point. A negative result suggests no detectable IgG antibodies, which may mean you haven’t been exposed recently or haven’t developed immunity yet.

Common Reasons for Testing

This test is often used to diagnose or confirm a diagnosis of *Mycoplasma pneumoniae* pneumonia, especially in cases where other causes of respiratory illness are suspected. It can also help monitor chronic conditions where recurrent infections are a concern.