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Mycoplasma pneumoniae Antibody, Serum (Qualitative Immunoassay)

Published: August 9, 2026Updated: August 16, 2026

This test detects antibodies to *Mycoplasma pneumoniae*, a common bacteria linked to respiratory infections like pneumonia and bronchitis. It helps identify if your immune system has responded to this organism.

Quick summary

["This test helps diagnose infections caused by *Mycoplasma pneumoniae* by checking for antibodies in your blood."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
23297-5
Short code
Mycoplasma Ab Ser Ql CF
Synonyms
Mycoplasma Ab Ser Ql CF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
comp-fix
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 Is Done

Your healthcare provider may order this test if you have symptoms like cough, fever, or chest pain that suggest a respiratory infection. It’s also used in cases where other tests for common bacteria (like strep or viruses) don’t explain your illness.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test is quick and typically done in a lab setting.

What the Test Results Mean

A positive result means your body has produced antibodies against *Mycoplasma pneumoniae*, indicating past or current infection. A negative result suggests no recent exposure or infection. Results are qualitative (yes/no) rather than a measured value.

Common Causes of Positive Results

Positive results are most common in people with active *Mycoplasma pneumoniae* infections, such as atypical pneumonia or ear infections. It can also appear after recovery or in rare cases of chronic exposure.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is critical for diagnosing infections that other tests might miss, especially in cases where symptoms persist despite negative results for common pathogens. It helps guide treatment decisions, such as starting antibiotics if *Mycoplasma pneumoniae* is confirmed.

Short name

Mycoplasma Antibody Screen

Frequently asked questions

Will this test show if I have a current infection?
This test detects antibodies, which develop after your body has encountered the bacteria. It may take a few weeks to become positive after infection, so it’s best for diagnosing past or recent exposure rather than acute infection. A positive result suggests you’ve likely been infected, but it doesn’t always indicate how severe the illness was.
What if my test is positive but I feel better?
A positive result means your immune system has responded to the bacteria, but it doesn’t always mean you’re still contagious. Some people clear the infection without lingering symptoms. Follow-up testing or symptoms will help determine if you need further treatment.
Can this test be used to confirm a diagnosis of pneumonia?
While this test can help identify *Mycoplasma pneumoniae* as a possible cause of pneumonia, it’s not the only test used. Your healthcare provider may combine this result with clinical findings, other tests (like chest X-rays), and culture results for a complete diagnosis.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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