European multicenter study of the LIAISON automated diagnostic system for determination of Toxoplasma gondii-specific immunoglobulin G (IgG) and IgM and the IgG avidity index

Eskild Petersen, Maria Victoria Borobio, Edward Guy, Oliver Liesenfeld, Valeria Meroni, Anne Naessens, Emma Spranzi, Philippe Thulliez

Research output: Contribution to journalArticle

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Abstract

The LIAISON system is a fully automated system based on chemiluminescence and antigen bound to magnetic microparticles. The system allows fast and precise measurement of Toxoplasma-specific immunoglobulin G (IgG) and IgM antibody levels and measurement of the IgG avidity index even at low levels of Toxoplasma-specific IgG antibodies in a single step without manual interference. Seven European centers participated in a multicenter evaluation of the LIAISON system. The sensitivity and specificity of the LIAISON system compared to the Sabin-Feldman dye test were 99.3 and 96.8%, respectively. In a comparison of the LIAISON Toxoplasma-specific IgM assay with an immunosorbent agglutination assay, the LIAISON assay had a sensitivity of 96.7% and a specificity of 95.4%. The LIAISON IgG assay showed agreements of 91, 100, and 100% with the AXSYM IgG (Abbott), VIDAS IgG (bioMérieux), and Platelia IgG (Bio-Rad) assays, respectively. The LIAISON IgM assay showed agreements of 95% with the AXSYM IgM and Platelia IgM assays, 96% with the ISAGA IgM assay (bioMérieux), and 97% with the VIDAS IgM assay. The coefficient of correlation between the LIAISON system and the VIDAS Toxoplasma-specific IgG avidity index was 0.81. By use of the Toxoplasma-specific IgG avidity index assay with specific IgM-positive samples, the diagnosis of infection with Toxoplasma gondii in early pregnancy has been improved significantly. The LIAISON avidity assay is a valuable assay for the exclusion of recently acquired infection with T. gondii (less than 4 months) in pregnant women, and it decreases significantly the necessity for follow-up testing.

Original languageEnglish
Pages (from-to)1570-1574
Number of pages5
JournalJournal of Clinical Microbiology
Volume43
Issue number4
DOIs
Publication statusPublished - Apr 2005

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Toxoplasma
Multicenter Studies
Immunoglobulin M
Immunoglobulin G
Toxoplasmosis
Immunosorbents
Antibodies
Agglutination
Luminescence
Pregnant Women
Coloring Agents
Antigens
Sensitivity and Specificity
Pregnancy

ASJC Scopus subject areas

  • Microbiology
  • Microbiology (medical)

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European multicenter study of the LIAISON automated diagnostic system for determination of Toxoplasma gondii-specific immunoglobulin G (IgG) and IgM and the IgG avidity index. / Petersen, Eskild; Borobio, Maria Victoria; Guy, Edward; Liesenfeld, Oliver; Meroni, Valeria; Naessens, Anne; Spranzi, Emma; Thulliez, Philippe.

In: Journal of Clinical Microbiology, Vol. 43, No. 4, 04.2005, p. 1570-1574.

Research output: Contribution to journalArticle

Petersen, Eskild ; Borobio, Maria Victoria ; Guy, Edward ; Liesenfeld, Oliver ; Meroni, Valeria ; Naessens, Anne ; Spranzi, Emma ; Thulliez, Philippe. / European multicenter study of the LIAISON automated diagnostic system for determination of Toxoplasma gondii-specific immunoglobulin G (IgG) and IgM and the IgG avidity index. In: Journal of Clinical Microbiology. 2005 ; Vol. 43, No. 4. pp. 1570-1574.
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AU - Liesenfeld, Oliver

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