Mycoplasma pneumoniae Antibody (IgM) – Serologic Test

What Does This Test Measure?

The test looks for IgM antibodies, a type of immune protein your body produces shortly after infection begins. IgM antibodies appear early in the illness but typically decline as your immune system shifts to producing other protective antibodies (like IgG).

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like persistent cough, chest pain, or unexplained fever, especially if other tests (like a chest X-ray or culture) are inconclusive. It’s often used in cases where *Mycoplasma pneumoniae* is suspected but not confirmed by other methods.

How Is the Sample Collected?

A blood sample is drawn from a vein in your arm. The blood is sent to the lab for testing. This process is quick and typically done in a doctor’s office or clinic.

What Are Possible Results?

A positive result indicates recent infection with *Mycoplasma pneumoniae* based on the presence of IgM antibodies. A negative result means no detectable IgM antibodies were found in this sample. Results alone don’t confirm a diagnosis; they’re often used alongside clinical findings and other tests.