What indicates a negative latex agglutination result?

What indicates a negative latex agglutination result?

• A. visible clumping
• B. color change
• C. disappearance of beads
• D. no signs of agglutination

Answer: (D)

Latex agglutination depends on antibodies on the beads linking together if the target antigen is present, causing visible clumping. When the antigen isn’t there, no cross-linking occurs and the beads stay dispersed with no aggregation. That lack of clumping is what signals a negative result. Color change isn’t a general readout for this test, and disappearance of beads isn’t how the assay is read either—the key point is whether agglutination occurs or not.

Latex agglutination depends on antibodies on the beads linking together if the target antigen is present, causing visible clumping. When the antigen isn’t there, no cross-linking occurs and the beads stay dispersed with no aggregation. That lack of clumping is what signals a negative result. Color change isn’t a general readout for this test, and disappearance of beads isn’t how the assay is read either—the key point is whether agglutination occurs or not.