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Cytomegalovirus IgG (CMV IgG)

CMV IgG is a blood test used to detect the presence of IgG antibodies to cytomegalovirus (CMV), which is a common viral infection. CMV is a member of the herpesvirus family and can cause a wide range of symptoms, including fever, fatigue, muscle aches, and swollen glands. IgG antibodies are produced by the immune system in response to an infection, and are typically detectable within a few weeks of initial exposure. The CMV IgG test is used to diagnose past or previous infections with this virus. Once a person has been infected with CMV, they will typically develop lifelong immunity to the virus, and their IgG antibody levels will remain detectable on subsequent tests. However, the presence of IgG antibodies does not necessarily indicate that the infection is currently active or causing symptoms. CMV IgG testing may be ordered for pregnant women to determine their immunity to the virus, as a primary CMV infection during pregnancy can pose a risk to the developing fetus.

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