Cytomegalovirus (CMV) IgG Avidity

Virology

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Description

In simple terms, the CMV IgG avidity can be described as the age of the antibody. Low means recently born and high >3 months old. For Information regarding sample types and volumes please follow the Weblink above

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Indications

Done when CMV IgM and IgG are both found to be positive.

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Sample Type

Clotted Blood / Serum

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Reference Range

Not applicable

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Turnaround Time

Within 2 days

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Testing Frequency

As required

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External Notes

This test is usually requested from within the lab. Reported as Low, Equivocal or High. Finding of a low or equivocal avidity will require serial follow up samples to look for rises in avidity. This test is used to ascertain whether the CMV IgG reactivity is due to a recent primary infection ( within three months ).

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Patient Preparation

None

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Please note: the above information is subject to change and we endeavour to keep this website up to date wherever necessary.