Quantitative measurement of specific antibody levels using a probe-based immunoassay (e.g., for detecting certain antigens in serum/plasma)

What This Test Measures

The test uses a probe to identify and quantify a specific substance (antigen) in your blood. This could be a protein, toxin, or other molecule that your immune system recognizes. The probe binds to this substance if it’s present, allowing the test to measure its concentration accurately.

How the Test Works

Your blood sample is processed to separate serum or plasma. The probe detects the target substance, and the test measures its concentration through a calibrated immunoassay method. This helps determine if the substance is present at detectable levels.

Common Uses

This type of test may be used to diagnose infections, monitor immune responses, or screen for exposure to toxins or allergens. It can also help track treatment effectiveness in conditions like autoimmune diseases or chronic infections.

Preparation and Sample Collection

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if instructed. Blood is drawn from a vein, and the sample is sent to a lab for analysis. The probe-based method ensures precise detection of the target substance.