Test Details
Methodology
Enzyme immunoassay (EIA)
Result Turnaround Time
1 - 4 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
Aid in the diagnosis of atypical pneumonia and Stevens-Johnson syndrome by providing laboratory support for a Mycoplasma pneumoniae infection. Results must be interpreted in light of each patient's history, physical examination, and other diagnostic findings.
Limitations
The absorbent used in this assay removes as much as 15 mg/mL of human IgG, but the presence of residual IgG in individuals with hypergammaglobulinemia may affect results adversely.
References
Custom Additional Information
Low positive results (770-950 units/mL) are presumptive evidence of acute or recent infection. It is recommended that the test be repeated on a fresh specimen one to two weeks later to assure reactivity. Specific IgM may persist for several months after initial infection or be absent during reinfection.
Specimen Requirements
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 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 x3 |
Reference Range
Negative: <770 units/mL
Storage Instructions
Maintain specimen at 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 |
|---|---|---|---|---|---|---|
| 163212 | Mycoplasma pneumoniae, IgM Ab | 5256-3 | 163213 | M pneumoniae IgM Abs | U/mL | 5256-3 |
| Order Code | 163212 | |||||
| Order Code Name | Mycoplasma pneumoniae, IgM Ab | |||||
| Order Loinc | 5256-3 | |||||
| Result Code | 163213 | |||||
| Result Code Name | M pneumoniae IgM Abs | |||||
| UofM | U/mL | |||||
| Result LOINC | 5256-3 |