Serotype-Specific IgG Antibody to Pneumococcal Polysaccharides by Immunoassay (Serum)
This test measures your immune system’s response to different types of pneumococcal bacteria, which can cause serious infections like pneumonia, meningitis, or bloodstream infections. It helps assess whether your body has developed protective antibodies against these bacteria.
["This test helps evaluate your immunity to common pneumococcal strains and guides decisions about vaccination or booster recommendations."]
Key facts at a glance
- LOINC
- 42360-8
- Short code
- S pneum 14 serotypes IgG Pnl A Ser-mCnc
- Synonyms
- S pneum 14 serotypes IgG Pnl A 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
Your healthcare provider may order this test if you have a history of pneumococcal infections, are at high risk for complications (e.g., elderly, immunocompromised, or with chronic health conditions), or if you’re considering vaccination against pneumococcal disease. It may also be used to monitor immune response after vaccination.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample drawn from a vein, typically in a clinic or lab. The blood is processed to separate serum for testing.
What the Test Results Mean
Results show the presence and level of IgG antibodies against specific pneumococcal serotypes. Higher levels indicate a stronger immune response, but exact thresholds vary by serotype and clinical context. Results are interpreted by your healthcare provider in the context of your medical history and symptoms.
Common Reasons for Testing
This test is often used to confirm immunity before procedures that increase infection risk (e.g., invasive medical devices) or to evaluate vaccine effectiveness in people with weakened immune systems.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
Pneumococcal IgG Antibody Levels
Frequently asked questions
How does this test differ from a general pneumococcal antibody screen?
What if my test results are low for certain serotypes?
Can this test be used to diagnose an active pneumococcal infection?
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