Mycoplasma pneumoniae IgM test
Quick answer: This blood test looks for IgM antibodies against Mycoplasma pneumoniae, a bacterium that causes chest infections. Doctors order it when you have a cough, fever or pneumonia and Mycoplasma infection is suspected.
- SampleBlood
- TakesAbout 5 minutes
- Before the testNo special preparation is usually needed.
How the test is done
- 1You sit and your arm is supported
- 2A vein on your arm is cleaned
- 3A needle draws a tube of blood
- 4The lab tests for Mycoplasma pneumoniae IgM antibodies
What your results can mean
Reading your report
A positive IgM usually suggests a recent or current infection and a positive IgG a past infection or immunity, but your doctor will read the result alongside your symptoms.
If the result is outside the usual range
A positive IgM can point to a recent Mycoplasma chest infection, often called walking pneumonia. It can be negative early in illness or stay positive for weeks, so results are read with symptoms.
Who usually has this test
Children and young adults with a lingering dry cough, fever and tiredness, or pneumonia that is not improving as expected.
Risks and aftercare
No special aftercare; finish any antibiotic course as prescribed.
Names and options
Also called: mycoplasma IgM, walking pneumonia test
Listed by the hospital as
- MYCOPLASMA IGM, SERUM
Questions about this test
What is walking pneumonia?
It is a milder pneumonia where people often stay up and about. Mycoplasma is a common cause, especially in school-age children and young adults.
Why might my doctor use a swab instead of blood?
A throat or nose swab PCR can detect Mycoplasma directly, especially early. Blood IgM is useful later in the illness.
Can Mycoplasma infection spread at home?
Yes, it spreads through coughs and close contact. It often passes slowly through families or schools.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
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This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.