Mycoplasma pneumoniae Antibody, IgG (Serum or Plasma)
This test measures your body’s immune response to *Mycoplasma pneumoniae*, a common bacteria linked to respiratory infections like pneumonia and bronchitis.
["Helps diagnose past or current infections caused by *Mycoplasma pneumoniae* through antibody detection."]
Key facts at a glance
- LOINC
- 34883-9
- Short code
- Mycoplasma Ag Tiss Ql ImStn
- Synonyms
- Mycoplasma Ag Tiss Ql ImStn
- 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
- immune-stain
- 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
Why This Test Matters
Mycoplasma pneumoniae is a tiny bacteria that can cause mild to severe respiratory illnesses. Some people may not show symptoms, but others might experience fever, cough, or chest pain. This test checks if your immune system has produced antibodies against this bacteria, which can indicate past exposure or an ongoing infection.
How the Test Works
Your healthcare provider will take a blood sample (serum or plasma) to detect IgG antibodies. IgG is a type of antibody your body produces in response to infection. If present, it suggests you’ve been exposed to *Mycoplasma pneumoniae* at some point.
When You Might Need This Test
Doctors may order this test if you have symptoms of respiratory infections (like persistent cough, fever, or shortness of breath) and other tests (like a chest X-ray or culture) aren’t conclusive. It’s also used in cases where *Mycoplasma pneumoniae* is suspected in outbreaks or clusters of similar illnesses.
What to Expect Before the Test
No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re on blood-thinning medications, let your provider know before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive IgG antibodies indicate past infection or immunity, but they don’t confirm an active infection. If symptoms persist, additional testing (like PCR or culture) may be needed to diagnose an ongoing *Mycoplasma pneumoniae* infection. This test is useful for diagnosing delayed or atypical cases, especially in people with mild or atypical symptoms.
Short name
Mycoplasma pneumoniae IgG Antibody
Frequently asked questions
How long does it take to get results?
Can I have this test if I’m pregnant?
What if my test results are positive but I don’t have symptoms?
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