Lab test

Cytomegalovirus (CMV) IgG Antibody Test

The cytomegalovirus (CMV) IgG antibody test checks whether a person has antibodies to CMV, a common virus that often causes mild or no symptoms.

Typical price

From $119

Results

1-3 business days

Preparation

See preparation notes below

Sample

Blood draw or sample collection at a local center

The cytomegalovirus (CMV) IgG antibody test checks whether a person has antibodies to CMV, a common virus that often causes mild or no symptoms. IgG antibodies indicate exposure at some point in the past or an ongoing infection, while the absence of IgG generally suggests no prior exposure. The test may be ordered before organ or blood donation, during pregnancy, or when a provider is evaluating a person with symptoms that could relate to CMV. It is often interpreted together with a CMV IgM test when recent infection is being considered.

• CMV IgG antibody Detects antibodies that indicate past or current CMV exposure.
• CMV IgM antibody May be measured alongside IgG when recent infection is being considered.

• Pregnant individuals being screened for CMV exposure
• Organ or blood donors and transplant candidates
• People with symptoms that could relate to CMV
• Individuals being evaluated for prior virus exposure

• No fasting is required.
• Tell the collector about recent illness or treatments you have had.
• Follow any instructions given by the collection site.

A positive CMV IgG usually means the person has been exposed to CMV at some point, while a negative result generally suggests no prior exposure. IgG alone cannot show exactly when exposure occurred, so a provider may add an IgM test or other testing to assess timing. Discuss results with a healthcare provider, who can interpret them with your history.

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