A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Cytomegalovirus Antibodies (IgG, IgM)
Test Code6732
Alias/See Also
LAB00361
CMV ANTIBODIES
CMV ANTIBODIES
CPT Codes
86644, 86645
Preferred Specimen
1.5 mL serum
Minimum Volume
0.7 mL
Transport Container
Transport 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 • Grossly icteric
Methodology
Immunoassay (IA)
Limitations
False-positive IgM test results may be due to the presence of heterophil antibodies or presence of rheumatoid factor.
Reference Range
Cytomegalovirus Antibody (IgG)
U/mL | Interpretation |
<0.60 | Negative |
0.60-0.69 | Equivocal |
≥0.70 | Positive |
Cytomegalovirus Antibody (IgM)
AU/mL | Interpretation |
<30.00 | No antibody detected |
30.00-34.99 | Equivocal |
≥35.00 | Antibody detected |
Clinical Significance
Intrauterine or congenital CMV infections occur in 0.5 to 2.2% of all live births. Symptomatic congenital infections usually occur in infants born to non-immune mothers who have primary infections during pregnancy. Latency and reactivation of CMV influence the interpretation of serological results. A single positive CMV IgG result is and indication of present or past infection. The presence of CMV IgM suggests a recent CMV exposure but does not differentiate between primary infection and reactivation.
Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA |
33608 Ortega Highway |
San Juan Capistrano, CA 92675-2042 |