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For hours, walk-ins and appointments.Special Instructions
Identify specimen as acute or convalescent. Acute and convalescent specimens must be submitted on separate test request forms.
Expected 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.
Related Documents
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
Storage Instructions
Refrigerate.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 14 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x4 |
Causes for Rejection
Hemolysis; lipemia; gross bacterial contamination
Test Details
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].
Limitations
Most adults are infected with CMV and it is normal to be a carrier of the virus.
Methodology
Chemiluminescent immunoassay (CLIA)
Reference Interval
• Negative: <0.60 U/mL
• Equivocal: 0.60−0.69 U/mL
• Positive: >0.69 U/mL
Additional Information
CMV causes an infectious mononucleosis syndrome clinically indistinguishable from heterophil positive mononucleosis. Signs include fever, malaise, and increased transaminase levels without jaundice.
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 |
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The LOINC® codes are copyright © 1994-2023, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf