Cytomegalovirus (CMV) IgG Antibody in Whole Blood by Immunofluorescence

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have a weakened immune system (such as from HIV, chemotherapy, or organ transplant), or if you’re planning a procedure that requires immune monitoring (like a bone marrow transplant or organ transplant). It can also be used to assess immunity in pregnant women or newborns.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw a blood sample. It usually takes a few minutes, and you may feel a brief pinch. If you’re pregnant or have a history of bleeding disorders, let your provider know before the test.

What the Test Results Mean

A positive result means you have antibodies to CMV, indicating past infection and likely immunity. A negative result suggests you may not have been exposed or have very low immunity. Results are not used to diagnose active infection but help guide preventive or protective measures.

Common Reasons for Testing

This test is often used in high-risk groups to prevent CMV-related complications, such as infections in transplant patients or pregnant women to protect their babies.