Performance Evaluation of a New Automated Chemiluminescent Immunoanalyzer-Based Interferon-Gamma Releasing Assay AdvanSure I3 in Comparison With the QuantiFERON-TB Gold In-Tube Assay
Annals of Laboratory Medicine
;
: 33-39, 2020.
Article
Dans Anglais
| WPRIM
| ID: wpr-762457
ABSTRACT
BACKGROUND:
The interferon-gamma (IFN-γ) releasing assay (IGRA) is widely used for latent tuberculosis infection (LTBI) diagnosis. We evaluated the analytical performance of a new automated chemiluminescent immunoanalyzer-based IGRA (CLIA-IGRA), AdvanSure I3 (LG Life Sciences, Seoul, Korea) and compared it with that of the QuantiFERON-TB Gold In-Tube (QFT-GIT) assay.METHODS:
Repeatability and reproducibility were evaluated at four levels. Detection capability, including limit of blank (LoB), limit of detection (LoD), and limit of quantification (LoQ), was evaluated using IFN-γ standard material (National Institute for Biological Standards and Control code 87/586). Agreement between the results of two assays was evaluated using 341 blood samples from healthcare workers and patients at a tertiary care hospital. To determine the cut-off value of CLIA-IGRA for diagnosing LTBI, the ROC curve was analyzed.RESULTS:
Repeatability and reproducibility were 4.86–7.00% and 6.36–7.88% CV, respectively. LoB, LoD, and LoQ were 0.022, 0.077, and 0.249 IU/mL, respectively. IFN-γ values between CLIA-IGRA and QFT-GIT showed a strong correlation within the analytical measurable range of both assays, especially when the value was low. Qualitative comparison of the two assays yielded a 99.1% overall agreement (kappa coefficient=0.98). A cut-off value of 0.35 IU/mL was appropriate for diagnosing LTBI.CONCLUSIONS:
CLIA-IGRA is a reliable assay for LTBI diagnosis, with performance similar to that of QFT-GIT.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Soins de santé tertiaires
/
Courbe ROC
/
Disciplines des sciences biologiques
/
Interféron gamma
/
Prestations des soins de santé
/
Diagnostic
/
Tuberculose latente
/
Limite de détection
/
Séoul
Type d'étude:
Etude diagnostique
/
Guide de pratique
/
Étude pronostique
/
Recherche qualitative
Limites du sujet:
Humains
Pays comme sujet:
Asie
langue:
Anglais
Texte intégral:
Annals of Laboratory Medicine
Année:
2020
Type:
Article
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