Serotype-specific immunoglobulin G (IgG) antibodies to pneumococcal bacteria (serum)
This test measures your immune system’s response to different types of pneumococcal bacteria by detecting specific antibodies in your blood.
["It helps assess immunity after vaccination or natural exposure to pneumococcal strains."]
Key facts at a glance
- LOINC
- 42359-0
- Short code
- S pneum 14 serotypes IgG Pnl B Ser-mCnc
- Synonyms
- S pneum 14 serotypes IgG Pnl B Ser-mCnc
- Category
- coagulation
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- 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
Doctors may order this test to evaluate whether you have developed immunity against specific pneumococcal serotypes after receiving a pneumococcal vaccine or following an infection. It can also help monitor immune response in people with weakened immune systems or those at higher risk of pneumococcal diseases.
What to Expect Before the Test
No special preparation is needed. A blood sample will be drawn from a vein, usually in your arm. You may feel a slight pinch, but it typically takes only a few minutes.
What the Test Results Mean
Results show the presence and level of antibodies against particular pneumococcal serotypes. Higher levels indicate a stronger immune response, while lower or absent levels suggest insufficient immunity. Interpretation depends on clinical context, such as vaccination history or symptoms.
Common Reasons for Testing
This test is often used in pediatric care to confirm vaccine effectiveness, in immunocompromised patients to track immune responses, or in research settings to study pneumococcal immunity.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: This test helps identify if your immune system has produced protective antibodies against pneumococcal bacteria, which can cause serious infections like pneumonia, bloodstream infections, or meningitis. It is particularly useful for guiding vaccination strategies, monitoring immune function, and assessing risk in high-risk populations.
Short name
Pneumococcal IgG serotype antibodies
Frequently asked questions
Will this test show if I have pneumonia?
How long will I need to wait for results?
Can I get this test if I’m pregnant?
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