Test Details
Methodology
Enzyme-linked immunosorbent assay (ELISA)
Result Turnaround Time
1 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Use
Establish evidence of early/acute infection with Bordetella pertussis, the causative agent of whooping cough. The presence of specific IgA in a single sample may indicate an acute infection and is considered suggestive of recent infection or a presumptive diagnosis of a supporting clinical presentation. Initially, in infants with pertussis, IgA antibody may not be detected; however, IgA reaches detectable levels six to seven weeks after infection.
Specimen Requirements
Specimen
Serum
Volume
0.4 mL
Minimum Volume
0.2 mL
Container
Red-top tube or gel-barrier tube
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 14 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x4 |
Reference Range
Negative: <1.0 index
Storage Instructions
Room temperature
Causes for Rejection
Hemolysis; lipemia; gross bacterial contamination
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 164384 | B pertussis IgA Ab | 29657-4 | 164387 | B pertussis IgA Ab | index | 29657-4 |
| Order Code | 164384 | |||||
| Order Code Name | B pertussis IgA Ab | |||||
| Order Loinc | 29657-4 | |||||
| Result Code | 164387 | |||||
| Result Code Name | B pertussis IgA Ab | |||||
| UofM | index | |||||
| Result LOINC | 29657-4 |