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Comparison of five commercial anti-tetanus toxoid immunoglobulin G enzyme-linked immunosorbent assays

A L Perry1, A J Hayes, H A Cox

  • 1The Binding Site Group Limited, P.O. Box 11712, Birmingham B14 4ZB, United Kingdom.

Clinical and Vaccine Immunology : CVI
|October 2, 2009
PubMed

Five commercially available enzyme-linked immunosorbent assays for the measurement of anti-tetanus toxoid immunoglobulin G (IgG) antibodies were evaluated for performance. The data suggest that there are manufacturer-dependent differences in sensitivity and accuracy for the determination of tetanus toxoid IgG antibodies that could result in different diagnostic interpretations.

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Enzyme-Linked Immunosorbent Assay01:33

Enzyme-Linked Immunosorbent Assay

In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen.  Enzyme-substrate reaction allows the antigen to be visualized or quantified.