Chemiluminescent EIA offers advantages due to which characteristic?

• A. high background interference
• B. low detection limits with little background interference
• C. requires radioactive labels
• D. requires colorimetric readout

Answer: (B)

Chemiluminescent immunoassays deliver light as the detection signal, so the readout is highly specific and very low in background. In these assays, the enzymatic reaction produces photons, and because there’s minimal ambient luminescence in the assay environment, the background signal is small. This combination yields a high signal-to-noise ratio, enabling detection of very small amounts of analyte—i.e., a low detection limit. The method achieves sensitivity without relying on radioactive labels or color changes, which is why the best description is that it offers low detection limits with little background interference.