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Measures the strength of CMV IgG antibodies to help tell if a cytomegalovirus infection is recent or old.
CMV IgG avidity measures how strongly your IgG antibodies bind to cytomegalovirus (CMV). High avidity usually means the infection happened in the past. Low avidity suggests the infection is recent. This helps doctors determine timing of CMV exposure. Timing is important in pregnancy because recent infection can harm the developing baby. The test also helps assess reactivation in people with weak immunity. Doctors use it along with CMV IgM and IgG results, ultrasound, and other tests to guide follow-up, counseling, and treatment decisions. It helps evaluate risk of congenital CMV, which can cause hearing loss, vision problems, or developmental delays in infants. Low avidity in pregnancy often leads to repeat testing, targeted ultrasound, or amniocentesis to check the fetus. In transplant or HIV patients, it helps detect reactivation and guide antiviral therapy. Results can be complex and are best explained by your clinician.
No special preparation is required.
The CMV IgG Avidity (CytomegaloVirus) test evaluates various parameters related to the different components. Here are the main parameters that are checked in the test:
CMV IgG Avidity (CytomegaloVirus) is often part of prenatal infectious screens or a TORCH panel and follows positive CMV IgM. Doctors order it when pregnant patients have symptoms like fever or swollen glands, or when newborns show possible CMV signs. It helps diagnose primary recent infection, congenital infection, or reactivation. Abnormal low avidity indicates recent infection; immune suppression or timing after exposure affects results. Family history of congenital CMV raises importance.
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I connected with the concierge team today and spoke with Vijay—he was helpful and made a real effort to address my concerns.
Vijay Bisht was friendly, helpful, and made our home test process seamless. Grateful for his timely support and follow-up.
A big thank you to Shikhar from the Visit app for going above and beyond to arrange a last-minute appointment during an urgent situation. His seamless coordination truly made a difference.
Shikhar Singh's prompt and proactive support—despite ongoing delivery issues—completely changed my view of Visit's service. Truly commendable!
I connected with the concierge team today and spoke with Vijay—he was helpful and made a real effort to address my concerns.
Thank you, Shared Gupta, for the great support with my reimbursement claims and Wipro health packages. Truly appreciated!
Huge thanks to Shikhar who handled our emergency situation with such care. He was always responsive, professional, and his dedication made a real difference.
The service was excellent—she was helpful, patient, and made my recovery smooth and stress-free. Her support made a real difference.
Great experience at a company that truly cares about its customers. The team went above and beyond to ensure everything was perfect.
Thank you, Shared Gupta, for the great support with my reimbursement claims and Wipro health packages. Truly appreciated!
Huge thanks to Shikhar who handled our emergency situation with such care. He was always responsive, professional, and his dedication made a real difference.
The service was excellent—she was helpful, patient, and made my recovery smooth and stress-free. Her support made a real difference.
Great experience at a company that truly cares about its customers. The team went above and beyond to ensure everything was perfect.