Serological test for pneumococcal serotype immunoglobulin G (IgG) antibodies
This test measures the level of antibodies your body produces in response to pneumococcal bacteria, which can cause serious infections like pneumonia, bloodstream infections, or meningitis.
["Helps assess immune response to pneumococcal bacteria and may guide vaccination decisions."]
Key facts at a glance
- LOINC
- 42771-6
- Short code
- S pneum serotype IgG Ser-Imp
- Synonyms
- S pneum serotype IgG Ser-Imp
- 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 from pneumococcal disease (e.g., due to weakened immune system, chronic health conditions, or advanced age), or if you’re considering vaccination against pneumococcal bacteria.
What to Expect Before the Test
No special preparation is needed. A blood sample will be taken from a vein in your arm, similar to other blood tests. You may feel a slight pinch, but it usually doesn’t cause discomfort.
What the Test Results Mean
Results indicate whether your body has developed antibodies against specific pneumococcal serotypes. Elevated levels suggest an immune response, while lower or absent levels may mean you’re at higher risk for infection if exposed.
Common Reasons for Testing
This test is often used to monitor immune response after vaccination, evaluate risk in high-risk individuals, or diagnose certain immune-related conditions affecting antibody production.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: This test helps identify individuals who may benefit from pneumococcal vaccination, assess immune function, or guide treatment decisions in cases of recurrent infections. It’s particularly important for people with conditions like HIV/AIDS, asplenia, or chronic lung diseases that increase vulnerability to pneumococcal infections.
Short name
Pneumococcal IgG Antibody Screening
Frequently asked questions
Will this test show if I’ve had pneumococcal disease before?
How long will it take to get my 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