Interferon- Release Assays Improve the Diagnosis of Tuberculosis and Nontuberculous Mycobacterial Disease in Children in a Country with a Low Incidence of Tuberculosis
Clinical Infectious Diseases·
- DOI
- 10.1086/519266
- PMID
- 17599309
- PMCID
- —
- OpenAlex
- W2141700270
- Study type
- Journal article
- Publisher
- Oxford University Press (OUP)
- Article type
- journal-article
- Integrity
- current
Why this research matters now
The findings suggest IGRAs can reduce overdiagnosis and unnecessary treatment of tuberculosis in children by improving specificity, particularly in settings with nontuberculous mycobacterial disease and bacille Calmette-Guerin vaccination.
Structured evidence summary
Research question
The study assessed whether interferon-gamma release assays (IGRAs) improve diagnostic accuracy for tuberculosis and nontuberculous mycobacterial disease in children compared to the tuberculin skin test in a low-incidence setting.
Study design
Hospital-based diagnostic accuracy study comparing two IGRAs (T-SPOT and QuantiFERON-TB Gold In-Tube) and the tuberculin skin test in a cohort of 73 children with bacteriologically confirmed outcomes.
Population and setting
The cohort included 73 children (median age 39 months) in a low tuberculosis incidence area: 28 with bacteriologically confirmed TB, 23 with confirmed nontuberculous mycobacterial lymphadenitis, and 22 with other nonmycobacterial respiratory infections.
Main findings
Both IGRAs demonstrated higher specificity for TB than the tuberculin skin test (QFT-IT 100%, T-SPOT 98% versus TST 58%), while maintaining comparable sensitivity (IGRAs 93%, TST 100%). The IGRAs successfully distinguished false-positive TST results caused by nontuberculous mycobacterial disease, where TST specificity dropped to 10.5%.
Public-health relevance
The findings suggest IGRAs can reduce overdiagnosis and unnecessary treatment of tuberculosis in children by improving specificity, particularly in settings with nontuberculous mycobacterial disease and bacille Calmette-Guerin vaccination.
Important limitations
Indeterminate results occurred in 6.8% of IGRA tests. This summary is limited to the supplied single-article abstract and metadata; the original paper is required for decision-grade interpretation of methodological limitations, generalizability, and clinical applicability.
GIDS interpretation
The article was indexed with tuberculosis, diagnostics, treatment, and vaccination topics in a German setting. These metadata improve discoverability for clinical and epidemiological reviews but do not indicate an active surveillance signal or causal relationship to current disease trends.
Related GIDS surveillance
Literature context does not validate, explain, or change a surveillance signal. Exact and contextual relationships are shown separately.
Evidence relationships
This article has 13 auditable classifier relationships to diseases, places, topics, and study design.