Not recommended as a standalone test. If using serology testing, IgM combined with IgG is preferred. Do not use for diagnosis in immunocompromised individuals. Preferred test for detecting CMV infection is Cytomegalovirus by Quantitative PCR (0051813).
Semi-Quantitative Chemiluminescent Immunoassay
Within 24 hours
Serum Separator Tube (SST).
Allow specimen to clot completely at room temperature. Separate from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens.
Contaminated, heat-inactivated or grossly hemolyzed specimens.
Label specimens plainly as acute or convalescent.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (Avoid repeated freeze/thaw cycles)
|29.9 AU/mL or less:||Not Detected.|
|30.0-34.9 AU/mL:||Indeterminate - Repeat testing in 10-14 days may be helpful.|
|35.0 AU/mL or greater:||Detected - IgM antibody to CMV detected, which may indicate a current or recent infection. However, low levels of IgM antibodies may occasionally persist for more than 12 months post-infection.|
CMV serology is not useful for the evaluation of active or reactivated infection in immunocompromised patients. Molecular diagnostic tests (i.e., PCR) are preferred in these cases.
This test should not be used for blood donor screening, associated re-entry protocols, or for screening Human Cell, Tissues and Cellular and Tissue-Based Products (HCT/P).
|Component Test Code*||Component Chart Name||LOINC|
|0050553||CMV Antibody IgM||7853-5|
- CMV Antibody
- CMV IgM