Respiratory Syncytial Virus (RSV) IgA ELISA

The DRG RSV IgA ELISA Kit is a solid phase enzyme-linked immunosorbent assay (ELISA)

Microtiter wells as a solid phase are coated with RSV antigen.

Diluted sample specimens and ready-for-use controls are pipetted into these wells. During incubation RSV-specific antibodies of positive specimens and controls are bound to the immobilized antigens.

After a washing step to remove unbound sample and control material horseradish peroxidase conjugated anti-human IgA antibodies are dispensed into the wells. During a second incubation this anti-IgA conjugate binds specifically to IgA antibodies resulting in the formation of enzyme-linked immune complexes.

After a second washing step to remove unbound conjugate the immune complexes formed (in case of positive results) are detected by incubation with TMB substrate and development of a blue color. The blue color turns into yellow by stopping the enzymatic indicator reaction with sulfuric acid.

The intensity of this color is directly proportional to the amount of RSV-specific IgA antibody in the specimen. Absorbance at 450 nm is read using an ELISA microtiter plate reader.