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Mycoplasma pneumoniae Antibody (IgG)
Test CodeLAB656
Quest Code
659
Alias/See Also
MYCG
MYCOG
MYCOG
CPT Codes
86738
Preferred Specimen
1 mL serum
Minimum Volume
0.1 mL
Other Acceptable Specimens
No additive (royal blue-top) tube
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Icteric
Methodology
Immunoassay (IA)
Setup Schedule
Set up: Daily; Report Available: 1-2 days
Limitations
IgM antibody testing is valuable for early diagnosis in children; in adults, paired sera for specific IgG and IgM are generally required together with PCR. Specific IgM antibodies are often absent in reinfections; specific IgA might be quite useful in this circumstance.
Reference Range
| ≤0.90 | Negative |
| 0.91-1.09 | Equivocal |
| ≥1.10 | Positive |
Clinical Significance
Mycoplasma are the smallest of the free-living organisms. M. pneumoniae causes approximately 10-20% of all cases of pneumonia. These pneumonias that can affect otherwise healthy individuals, are commonly referred to as "walking" and "aypical" pneumonias.
Performing Laboratory
| Quest Diagnostics Nichols Institute |
| 33608 Ortega Highway |
| San Juan Capistrano, CA 92675-2042 |
