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What is a CYTOMEGALOVIRUS (CMV) ANTIBODY IgM?

Cytomegalovirus (CMV) Antibody IgM is a blood test that detects IgM antibodies produced by the immune system in response to CMV infection. The test is used to help evaluate a suspected recent or active CMV infection, particularly in people with relevant symptoms or specific clinical concerns. It may also be considered during pregnancy or in individuals with weakened immunity, where CMV infection can require closer assessment.

Additional Information

Also known as/ Other names: CMV IgM Antibody Test, Anti-CMV IgM Test, Cytomegalovirus IgM Serology, CMV IgM Screening, CMV IgM Assay, CMV IgM Detection – Serum
Parameters: 1
Recommended for: M/F/Others
Sample Type: Blood
Patient Preparation: No prior preparation is needed
Reports: Same Day

FAQs

What is cytomegalovirus (CMV)?

CMV is a common virus belonging to the herpesvirus family. After infection, the virus can remain in the body in an inactive state and may reactivate later.

What does a positive CMV IgM result mean?

A positive result indicates that CMV-specific IgM antibodies have been detected. It may occur with a recent infection, reactivation, or occasionally due to other factors, so further evaluation may be needed.

Does a positive CMV IgM confirm a recent CMV infection?

Not always. IgM can sometimes persist for an extended period or occur during reactivation. Additional testing, such as CMV IgG and IgG avidity, may help determine the timing of infection.

What does a negative CMV IgM result mean?

It means CMV-specific IgM antibodies were not detected. However, very early infection may not yet produce detectable antibodies.

What is the difference between CMV IgM and CMV IgG?

IgM is often associated with a recent immune response, while IgG generally indicates previous exposure. Interpretation depends on the combination of results and clinical context.

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