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Bordetella pertussis Antibodies, IgA, IgG, and IgM by ELISA with Reflex to Immunoblot
Ordering Recommendation
If serology is used to assess late-stage pertussis (>4 weeks), the recommended test is Bordetella pertussis Antibodies, IgA and IgG by ELISA with Reflex to Immunoblot (2001774). CDC-recommended first-line tests for pertussis are Bordetella pertussis/parapertussis by PCR (0065080) and/or Bordetella pertussis Culture (0060117).
New York DOH Approval Status
Specimen Required
Serum separator tube.
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.3 mL) Parallel testing is preferred, and convalescent specimens must be received within 30 days from receipt of the acute specimens. Mark specimens plainly as "acute" or "convalescent."
Refrigerated.
Bacterially contaminated, heat-inactivated, hemolyzed, icteric, lipemic, or turbid specimens.
New York State Clients: There are no NY approved tests available for the IgM component of this assay. NYSDOH will not approve NPL requests for IgM.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year
New York State Clients: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 1 month
Methodology
Semi-Quantitative Enzyme-Linked Immunosorbent Assay/Qualitative Immunoblot
Performed
Tue, Fri
Reported
1-5 days
Reference Interval
| Test Number |
Components |
Reference Interval |
|---|---|---|
| B. pertussis Ab, IgA by ELISA | 1.1 IV or less | |
| B. pertussis Ab, IgG by ELISA | 1.04 IV or less | |
| B. pertussis Ab, IgM by ELISA | 1.1 IV or less |
Interpretive Data
Recommend that treatment decisions be based on the result of the B. pertussis IgM immunoblot test instead of the ELISA test. B. pertussis IgM test by ELISA may produce false-positive results.
| Component | Interpretation |
|---|---|
| Bordetella pertussis Antibody, IgA by ELISA | 0.9 IV or less: Negative - No significant level of detectable Bordetella pertussis IgA antibody. 1.0-1.1 IV: Equivocal - Repeat testing in 10-14 days may be helpful. 1.2 IV or greater: Positive - IgA antibody to Bordetella pertussis detected, which may indicate a current or past exposure/immunization to B. pertussis. |
| Bordetella pertussis Antibody IgG by ELISA | 0.94 IV or less: Negative - No significant level of detectable B. pertussis IgG antibody. 0.95-1.04 IV: Equivocal - Repeat testing in 10-14 days may be helpful. 1.05 IV or greater: Positive - IgG antibody to B. pertussis detected, which may indicate a current or recent exposure/immunization to B. pertussis. |
| Bordetella pertussis Antibody IgM by ELISA | 0.9 IV or less: Negative - No significant level of detectable B. pertussis IgM antibody. 1.0-1.1 IV: Equivocal - Repeat testing in 10-14 days may be helpful. 1.2 IV or greater: Positive - IgM antibody to B. pertussis detected, which may indicate a current or recent exposure/immunization to B. pertussis |
Laboratory Developed Test (LDT)
Note
If Bordetella pertussis Antibody, IgA by ELISA is 1.2 IV or greater, then Bordetella pertussis IgA Immunoblot testing will be added; if Bordetella pertussis Antibody, IgG by ELISA is 1.05 IV or greater, then Bordetella pertussis IgG Immunoblot testing will be added; If Bordetella pertussis Antibody, IgM by ELISA is 1.2 IV or greater, then Bordetella pertussis IgM Immunoblot testing will be added. Additional charges apply.
Hotline History
CPT Codes
86615 x3; if reflexed, add 86615 for each Immunoblot
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 2001770 | B. pertussis Ab, IgA by ELISA | 42328-5 |
| 2001782 | B. pertussis Ab, IgG by ELISA | 42330-1 |
| 2001783 | B. pertussis Ab, IgM by ELISA | 42329-3 |
Aliases
- B. pertussis Abs panel reflex
- Pertussis Antibody
- Pertussis Abs (IgA, IgG, IgM) reflex to immunoblot
