| Titre : | Comparison of T-cell-based assay with tuberculin skin test for diagnosis of Mycobacterium tuberculosis infection in a school tuberculosis outbreak. (2003) |
| Auteurs : | Katie EWER ; Lydia ALVAREZ ; ANDERSEN (Peter) : DNK. Statens Serum Institut. Copenhagen. ; Gerry BRYANT ; DEEKS (Jonathan) : GBR. Centre for Statistics in Medicine. Institute of Health Sciences. Oxford. ; Ajit LALVANI ; Philip MONK ; Sue WALLER ; Leicestershire Health Authority. Leicester. GBR ; Nuffield Department of Clinical Medicine. University of Oxford. John Radcliffe Hospital. Oxford. GBR |
| Type de document : | Article |
| Dans : | Lancet (The) (vol. 361, n° 9364, 2003) |
| Pagination : | 1168-1173 |
| Langues: | Anglais |
| Mots-clés : | Tuberculose ; Bactériose ; Infection ; Bactérie ; Diagnostic ; Enfant ; Homme |
| Résumé : |
[BDSP. Notice produite par INIST-CNRS ocMR0x0s. Diffusion soumise à autorisation]. Background The diagnosis of latent tuberculosis infection relies on the tuberculin skin test (TST), which has many drawbacks. However, to find out whether new tests are better than TST is difficult because of the lack of a gold standard test for latent infection. We developed and assessed a sensitive enzyme-linked immunospot (ELISPOT) assay to detect T cells specific for Mycobacterium tuberculosis antigens that are absent from Mycobacterium bovis BCG and most environmental mycobacteria. We postulated that if the ELISPOT is a more accurate test of latent infection than TST, it should correlate better with degree of exposure to M tuberculosis. Methods A large tuberculosis outbreak in a UK school resulted from one infectious index case. We tested 535 students for M tuberculosis infection with TST and ELISPOT. We compared the correlation of these tests with degree of exposure to the index case and BCG vaccination. Findings Although agreement between the tests was high (89% concordance, K=O. 72, p |
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