Test directory: B. pertussis Ab, IgM Rfx Immunoblot

Ordering Code 7908
Test Name B. pertussis Ab, IgM Rfx Immunoblot
Alias Bordetella pertussis Ab,IgM by ELISA Rfx to Immunoblot
B. pertussis IgM reflex
Pertussis IgM Ab ELISA reflex to Immunoblot
Preferred Specimen Serum
Preferred Container SST (Gold)
Optimum Volume 1 mL
Collection Instructions 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."
If Bordetella pertussis Antibody, IgM by ELISA is 1.2 IV or greater, then Bordetella pertussis IgM Immunoblot testing will be added.
Handling Instructions Separate serum from cells within 2 hours of collection
Transport Requirements Oahu: Ambient
Airline: Refrigerated
Specimen Stability Ambient: 48 Hours
Refrigerated: 14 Days
Frozen: 1 Year
Stability applies ONLY to serum aliquots
Rejection Criteria Hemolyzed, Icteric, Lipemic, Bacterially contaminated, heat-inactivated, or turbid specimens
Avail. Stat NO
Analytic Time 8 Days
Methodology Semi-Quantitative Enzyme-Linked Immunosorbent
Assay/Qualitative Immunoblot
Reference Lab  ARUP Laboratories

Reference range(s)

The reference ranges listed below are valid on this date of June 29, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
B. pertussis Ab, IgM by ELISA ALL IV

Interpretive...
Interpretive Information: 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

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

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US
Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes

See report.
Note1

Note1:


Interpretive Information: 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

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

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US
Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes

See report..