Understanding Lab Tests for Active CMV Infection
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Cytomegalovirus (CMV) is a common virus that belongs to the herpes virus family. While many people carry CMV without symptoms, an active infection can cause serious complications, especially in immunocompromised individuals, pregnant women, and newborns. Blood tests are essential for diagnosing active CMV infections and monitoring the body's immune response.
Recommended Test
Cytomegalovirus (CMV) Antibodies, IgG
This test measures IgG antibodies that your immune system produces in response to CMV infection. High levels of CMV IgG antibodies can indicate an active or recent infection with cytomegalovirus. These antibodies are part of your body's natural defense mechanism against the virus and their elevated presence helps healthcare providers confirm CMV infection and assess your immune status.
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Diagnosing Active CMV Infection
CMV infections can be challenging to diagnose based on symptoms alone, as they often resemble other viral illnesses or may be asymptomatic. Laboratory testing is crucial for confirming an active infection by detecting the virus or measuring the body's immune response through specific antibodies.
Understanding Your Results
CMV antibody testing helps distinguish between past exposure and current infection. Your healthcare provider will interpret the results in conjunction with your symptoms and medical history to determine the appropriate course of action, which may include antiviral treatment in certain cases.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
