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Evaluation of a new third-generation ELISA for the detection of HIV infection

Joon-Sup Yeom1, Jae-Beom Lee, Seung-Ho Ryu

  • 1Dept. of Microbiology, Gachon Medical School, 1198, Kuwol-dong, Namdong-gu, Incheon 405-760, Korea (South).

Annals of Clinical and Laboratory Science
|February 28, 2006
PubMed

The purpose of this study was to assess whether the LG Anti-HIV 1/2 Plus ELISA (LG Life Sciences, Seoul, Korea), a new third-generation enzyme-linked immunosorbent assay for the detection of HIV infection, has improved sensitivity and specificity in comparison to the other licensed third-generation assays. The sensitivity of the LG Anti-HIV 1/2 Plus ELISA was comparable to the Enzygnost Anti-HIV 1/2 Plus ELISA (Dade Behring, Marburg, Germany) (100% vs 100%), and it was capable of detecting highly divergent subtypes including HIV-1 group O. The specificity of the LG Anti-HIV 1/2 Plus ELISA was 100%. The concordance of the LG Anti-HIV 1/2 Plus ELISA and the Enzygnost Anti-HIV 1/2 Plus was found to be 1. The LG Anti-HIV 1/2 Plus ELISA has a short window period among the third-generation ELISA assays and this test showed satisfactory reproducibility.

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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.