Cytomegalovirus Antibody, Serum or Plasma (Qualitative or Quantitative)

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like fatigue, fever, or organ-related issues that could be linked to CMV. It’s also used before organ transplants to check for prior exposure, especially if you’re a donor or recipient. Pregnant individuals may be tested to assess risk to the fetus.

What to Expect Before the Test

No special preparation is needed. A blood sample is drawn from a vein in your arm. You may feel a slight pinch, but it usually takes only a few minutes. If you’re pregnant or have a history of bleeding disorders, let your provider know beforehand.

What the Results Mean

A positive result means your body has produced antibodies against CMV, suggesting past infection or immunity. A negative result indicates no detectable antibodies, meaning you either haven’t been exposed or your immune system hasn’t mounted a response yet. Quantitative tests can show antibody levels over time.

Common Symptoms of CMV

CMV can cause mild symptoms like flu-like illness, but it often has no symptoms. In severe cases, it may affect organs such as the liver, lungs, or eyes, especially in immunocompromised individuals or newborns.