A comparison study of Interferon-gamma release assay between CLIA by LIAISON® XL and Enzyme-Linked Immunosorbent Assay (ELISA)

Authors

  • Onchuma Lohjai Faculty 0f Medicine-Ramathibodhi Hospital, Mahidol University
  • Mongkol Kunakorn Faculty of Medicine Ramathibodi Hospital, Mahidol University
  • Chavachol Setthaudom Faculty of Medicine Ramathibodi Hospital, Mahidol University
  • Mewadee Preecha Faculty of Medicine Ramathibodhi Hospital, Mahidol

DOI:

https://doi.org/10.14456/jmu.2024.6

Keywords:

latent tuberculosis infection, Interferon-Gamma Release Assay, QuantiFERON-TB Gold Plus, LIAISON® XL analyzers (CLIA)

Abstract

          The diagnosis of latent tuberculous infection (LTBI), in Ramathibodi Hospital, was detected in Interferon-gamma (IFN-γ) releasing assay (IGRA) by QuantiFERON-TB Gold Plus (QFT-Plus), however, it requires multiple steps of enzyme-linked immunosorbent assay (ELISA). To substitute the original test, The LIAISON® XL analyzers (CLIA), has been developed. The automated analyzer of this test is used for decreased workload and turnaround time. The objective of this study was to compare the performance and examine the correlation between IFN-γ quantified by QFT-Plus (ELISA) and LIAISON® XL analyzers (CLIA). One hundred and six specimens were analyzed using QFT-Plus (ELISA) and LIAISON® XL analyzers (CLIA).

          The correlation of IFN-γ results using LIAISON® XL analyzers (CLIA) compared with QFT-Plus (ELISA) showed 9 of 11 (81.8%) percentage agreement between the positive results in LIAISON® XL analyzers (CLIA) and QFT-Plus (ELISA), 86 of 90 (95.5%) percentage agreement between the negative results, and 5 of 5 cases (100%) percentage agreement between the indeterminate results. The total agreement of both methods was 94.34 percentage with Cohen's kappa values of 0.799 and 6 discordant results. In summary, the LIAISON® XL analyzers (CLIA) showed a correlation with QFT-Plus (ELISA) in the IFN-γ assay. Pearson’s correlation coefficient of either TB1 or TB2 antigen of the QFT-Plus (ELISA) and the LIAISON® XL analyzers (CLIA) were 0.98 and 0.96.

          Therefore, to reduce workload and increase speed of diagnostic, LIAISON® XL analyzers (CLIA) could be instant as the same test for detection of LTBI.

References

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Published

2024-04-22

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Research Articles