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The Impact of Borde...
The Impact of Borderline Quantiferon-TB Gold Plus Results for Latent Tuberculosis Screening under Routine Conditions in a Low-Endemicity Setting
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- Wikell, A. (author)
- Karolinska Institute,Karolinska Univ Hosp Solna, Sweden; Karolinska Inst, Sweden
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- Jonsson Henningsson, Anna (author)
- Linköpings universitet,Avdelningen för inflammation och infektion,Medicinska fakulteten,Region Östergötland, Klinisk mikrobiologi
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- Dyrdak, R. (author)
- Karolinska Institutet,Karolinska Institute,Karolinska Univ Hosp, Sweden; Karolinska Inst, Sweden
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- Henningsson, A. J. (author)
- Linköping University
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- Eringfält, A. (author)
- Halmstad County Hospital,Halland Cty Hosp, Sweden
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- Kjerstadius, T. (author)
- Karlstad Hospital,Cent Hosp Karlstad, Sweden
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- Hålldin, E. (author)
- Västmanland Hospital,Vasteras Cty Hosp, Sweden
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- Baqir, Haitham (author)
- Linköping University Hospital,Region Östergötland, Klinisk mikrobiologi
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- Kholod, Vita (author)
- Linköpings universitet,Avdelningen för klinisk kemi och farmakologi,Medicinska fakulteten,Region Östergötland, Klinisk mikrobiologi
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- Sturegård, E. (author)
- Lund University,Lunds universitet,Klinisk mikrobiologi, Malmö,Forskargrupper vid Lunds universitet,Clinical Microbiology, Malmö,Lund University Research Groups,Lund Univ, Sweden
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- Bruchfeld, J. (author)
- Karolinska Institutet,Karolinska Institute,Karolinska Univ Hosp Solna, Sweden; Karolinska Inst, Sweden
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- Schön, Thomas, 1973- (author)
- Linköpings universitet,Linköping University,Avdelningen för inflammation och infektion,Medicinska fakulteten,Region Östergötland, Infektionskliniken i Östergötland,Department of Infectious Diseases, Kalmar County Hospital, Kalmar, Sweden
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(creator_code:org_t)
- AMER SOC MICROBIOLOGY, 2021
- 2021
- English.
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In: Journal of Clinical Microbiology. - : AMER SOC MICROBIOLOGY. - 1098-660X .- 0095-1137. ; 59:12, s. 0137021-0137021
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Abstract
Subject headings
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- Quantiferon-TB Gold Plus (QFT-Plus) is an interferon gamma release assay used to diagnose latent tuberculosis (LTB). A borderline range (0.20 to 0.99 IU/ml) around the cutoff (0.35 IU/ml) has been suggested for the earlier QFT version. Our aims were to evaluate the borderline range for QFT-Plus and the contribution of the new TB2 antigen tube. QFT-Plus results were collected from clinical laboratories in Sweden and linked to incident active TB within 3 to 24 months using the national TB registry. Among QFT-Plus results from 58,539 patients, 83% were negative (<0.20 IU/ml), 2.4% were borderline negative (0.20 to 0.34 IU/ml), 3.4% were borderline positive (0.35 to 0.99 IU/ml), 9.6% were positive (≥1.0 IU/ml), and 1.6% were indeterminate. Follow-up tests after initial borderline results were negative (<0.20 IU/ml) in 38.3%, without any cases of incident active TB within 2 years. Applying the 0.35-IU/ml cutoff, 1.5% of TB1 and TB2 results were discrepant, of which 52% were within the borderline range. A TB2 result of ≥0.35 IU/ml with a TB1 result of <0.20 IU/ml was found in 0.4% (231/58,539) of all included baseline QFT-Plus test results, including 1.8% (1/55) of incident TB cases. A borderline range for QFT-Plus is clinically useful as more than one-third of those with borderline results are convincingly negative upon retesting, without developing incident active TB. The TB2 tube contribution to LTB diagnosis appears limited.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Infektionsmedicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Infectious Medicine (hsv//eng)
Keyword
- active tuberculosis
- borderline-range results
- interferon gamma release assay
- latent tuberculosis
- Quantiferon Plus
- latent tuberculosis; interferon gamma release assay; active tuberculosis; borderline-range results; Quantiferon Plus
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Wikell, A.
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Jonsson Hennings ...
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Dyrdak, R.
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Henningsson, A. ...
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Eringfält, A.
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Kjerstadius, T.
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show more...
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Hålldin, E.
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Baqir, Haitham
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Kholod, Vita
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Sturegård, E.
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Bruchfeld, J.
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Schön, Thomas, 1 ...
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Clinical Medicin ...
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and Infectious Medic ...
- Articles in the publication
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Journal of Clini ...
- By the university
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Lund University
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Linköping University
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Karolinska Institutet