Cytomegalovirus IgG avidity (VI, as listed)

IgG avidity reflects the strength with which antibodies bind to cytomegalovirus antigens. This is an additional test when IgG has already been detected. The marker may help clarify the timing of primary infection alongside IgM, previous tests and clinical information, particularly in certain pregnancy-related situations.

Low avidity does not establish the exact date of infection, and high avidity does not answer all questions about the condition of the fetus. The price list states CMV and the designation “VI”; before ordering, the laboratory must confirm that the test specifically concerns cytomegalovirus.

• Complement the assessment of CMV serology results.
• Clarify the probable timing of first contact, taking the method’s limitations into account.