Mycoplasma pneumoniae Antibody, Qualitative (IgM) - Serum
This test detects Mycoplasma pneumoniae antibodies in your blood to help diagnose infections caused by this common bacterial agent, often linked to respiratory illnesses.
["This test may help identify recent Mycoplasma pneumoniae infections, which can cause pneumonia, bronchitis, or other respiratory symptoms."]
Key facts at a glance
- LOINC
- 20898-3
- Short code
- Mycoplasma Mlk Ql Cult
- Synonyms
- Mycoplasma Mlk Ql Cult
- Category
- chemistry
- Sample
- plasma
- Container
- Lavender-top (EDTA) or Green-top (Heparin)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- organism-specific-culture
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
Mycoplasma pneumoniae is a small bacteria that can cause respiratory infections. This test looks for Mycoplasma pneumoniae antibodies, specifically IgM, which appear in your blood shortly after infection. IgM antibodies are typically produced early in an infection and can help confirm if you’ve recently been exposed to this bacterium.
Why It Might Be Ordered
Your healthcare provider may order this test if you have symptoms like cough, fever, or chest pain, especially if you’ve been exposed to someone with a respiratory infection. It’s often used in cases where other tests for common causes of pneumonia (like viruses or other bacteria) have not provided a clear diagnosis.
What to Expect Before the Test
No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw a blood sample. If you’re on blood-thinning medication or have a history of bleeding issues, let your provider know before the test.
What to Expect During the Test
The blood sample will be sent to a lab for testing. Results are typically qualitative (positive or negative) and may take a few days to a week to receive. Your provider will discuss the results with you based on your symptoms and medical history.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive IgM results suggest recent infection with Mycoplasma pneumoniae, which can cause mild to severe respiratory symptoms. While IgM antibodies are useful for diagnosing acute infection, they may not persist long-term. If symptoms persist or worsen, further testing or follow-up may be needed to rule out other conditions or complications.
Short name
Mycoplasma IgM Antibody (Serum)
Frequently asked questions
How long does it take to get the results of this test?
Can I have this test if I’m pregnant?
What if my test results come back positive?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy