CMV IgM
Test:
842
CPT:
86644
Synonyms
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
Specimen Requirements
Specimen
1 – 2 days
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
Collection
Storage Instructions
Refrigerate
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].