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HelpTest Code PNTO Streptococcus pneumoniae IgG Antibodies, Total, Serum
Reporting Name
S. pneumoniae IgG Ab, Total, SPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Assessing the IgG antibody response to active immunization with nonconjugated 23-valent pneumococcal vaccines
Assessing the IgG antibody response to active immunization with conjugated 13-valent, 15-valent and 20-valent pneumococcal vaccines
Determining the ability of an individual to produce an antibody response to polysaccharide antigens, as part of an evaluation for humoral or combined immunodeficiencies
Method Name
Enzyme-Linked Immunosorbent Assay (ELISA)
Ordering Guidance
This test is the preferred test for patients previously tested for Streptococcus pneumoniae antibodies (as part of follow up testing or part of pre/post vaccine assessment).
The preferred test for patients being evaluated for possible immunodeficiency or for assessment of pneumococcal vaccination response (initial evaluation) is PNTOR / Streptococcus pneumoniae IgG Antibodies, Total, with Reflex, Serum.
The preferred test for patients previously tested for S pneumoniae serotypes (as part of follow up testing or part of pre/post vaccine assessment) is PN23M / Streptococcus pneumoniae IgG Antibodies, 23 Serotypes, Serum.
Specimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Type
SerumSpecimen Minimum Volume
0.3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 21 days | |
| Frozen | 21 days |
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
| Heat-inactivated specimen | Reject |
Reference Values
≥9.7 mcg/mL
Interpretation
Low anti-pneumococcal antibody concentrations (<9.7 mcg/mL) indicate a poor response to the pneumococcal vaccine, while high concentrations (>270.0 mcg/mL) indicate a robust vaccine response. Results falling in the modest (9.7-40.9 mcg/mL), intermediate (41.0-180.9 mcg/mL), and moderate (181.0-270.0 mcg/mL) categories may warrant serotype-specific antibody testing, to be determined at the discretion of the physician.
When comparing pre- and post-vaccination samples, an increase in antibody concentrations is generally considered to be indicative of a normal vaccine response. However, the specific fold increase is influenced substantially by the antibody concentration observed in the pre-vaccination sample.
Day(s) Performed
Tuesday, Thursday
Report Available
2 to 8 daysTest Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
86317
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| PNTO | S. pneumoniae IgG Ab, Total, S | 43236-9 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| PNTO | S. pneumoniae IgG Ab, Total, S | 43236-9 |