Test Details
Methodology
Chemiluminescent immunoassay (CLIA)
Result Turnaround Time
1 - 2 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 determination of serological status to CMV. IgG antibodies rise gradually and persist for the rest of an individual's life. The specific IgG assay is useful in distinguishing who has been exposed to the virus from those who have not. Levels of IgM to hCMV usually increase for some weeks and decrease slowly thereafter, in four to six months. Occasionally, IgM may circulate for years. For the IgM assay, see Cytomegalovirus (CMV) Antibodies, Quantitative, IgM [096727].
Special Instructions
Identify specimen as acute or convalescent. Acute and convalescent specimens must be submitted on separate test request forms.
Limitations
Most adults are infected with CMV and it is normal to be a carrier of the virus.
Custom Additional Information
CMV causes an infectious mononucleosis syndrome clinically indistinguishable from heterophil positive mononucleosis. Signs include fever, malaise, and increased transaminase levels without jaundice.
Specimen Requirements
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.2 mL (Note: This volume does not allow for repeat testing.)
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: <0.60 U/mL
• Equivocal: 0.60−0.69 U/mL
• Positive: >0.69 U/mL
Storage Instructions
Refrigerate.
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 |
|---|---|---|---|---|---|---|
| 006494 | Cytomegalovirus (CMV) Ab, IgG | 5124-3 | 006499 | Cytomegalovirus (CMV) Ab, IgG | U/mL | 5124-3 |
| Order Code | 006494 | |||||
| Order Code Name | Cytomegalovirus (CMV) Ab, IgG | |||||
| Order Loinc | 5124-3 | |||||
| Result Code | 006499 | |||||
| Result Code Name | Cytomegalovirus (CMV) Ab, IgG | |||||
| UofM | U/mL | |||||
| Result LOINC | 5124-3 |