Serology

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When and why

Serology refers to tests used to detect the presence of specific antibodies in the blood. These are checked to see if the individual has had a prior exposure to a specific infection.

Examples of specific serology tests are those for toxoplasmosis, cytomegalovirus (CMV), syphilis, and hepatitis. Serology samples are obtained from a venous blood draw.

How it will help

The presence of antibodies to an infection indicates that the individual has previously been infected. With some infections, people who have severe damage to their immune system are at risk of re-activation. Knowledge of this risk allows treatments to be started that can prevent or reduce this risk (prophylaxis).

This content was checked for accuracy at the time it was written. It may have been superseded by more recent developments. NAM recommends checking whether this is the most current information when making decisions that may affect your health.