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Rev. Asoc. Esp. Espec. Med. Trab ; 25(2): 58-72, jun. 2016. tab, graf, ilus
Article in Spanish | IBECS | ID: ibc-154445

ABSTRACT

Objetivo: Valorar la eficiencia del uso del QuantiFERON-TB Gold (QTFGIT) en el diagnóstico de infección tuberculosa latente. Material y métodos: En la consulta de Medicina del Trabajo de un medio hospitalario, se comparan los resultados del QTF-GIT en trabajadores con prueba de la tuberculina (PT) positiva entre los años 2007-2014. Además, se realiza un estudio de validación diagnóstica para la PT en los puntos de corte de 10 y 5mm. Resultados: Se estudiaron 2.085 pacientes y se realizaron 2.679PT 182 (+), 2435 (-). Se realizaron 1.623 QTF-GIT; 132 (+), 1.486 (-). Tras una PT positiva el 61,4% QTF-GIT presentaron un resultado negativos (p<0.001). La PT, con puntos de corte en 10 y 5mm, muestra una sensibilidad del 88% y 100% (p<0.001) una especificidad del 35% y 3% (p<0.001) respectivamente. Conclusiones: La PT en la consulta de Medicina del Trabajo está justificada al tratarse de una prueba diagnóstica con alta sensibilidad, pero al generar un gran número de falsos positivos, precisa posteriormente de una prueba con una alta especificidad como el QTF-+GIT para evitar la quimioprofilaxis innecesaria (AU)


Objective: To evaluate the efficiency of QuantiFERON-TB Gold (QFT-GIT) to diagnose latent tuberculosis infection. Methods: In an Occupational Medicine consultation, we analysed the results of QFT-GIT in hospital workers with positive tuberculin skin test (TST) between years 2007-2014. Also a validation study was performed for the TST in the cut offs considered as 10 and 5 mm. Results: 2,085 patients were studied. We performed 2,679 TST 182 (+), 2,435 (-). 1,623 QTF-GIT were done; 132 (+), 1,486 (-). After a positive TST 61.4% QFTGIT showed a negative result (p<0.001). The TST, with 10 or 5 mm considered as cut-off, showed a sensitivity of 88% and 100% (p<0.001) and a specificity of 35% and 3% (p<0.001) respectively. Conclusions: The use of TST in Occupational Medicine is justified as it is a diagnostic test with high sensitivity, but as it generates a large number of false positive, confirmation with a higher specificity test, such as the QFT-GIT is required to avoid unnecessary chemoprophylaxis (AU)


Subject(s)
Humans , Male , Female , Tuberculin Test/instrumentation , Tuberculin Test/methods , Tuberculin Test , Latent Tuberculosis/diagnosis , Latent Tuberculosis/epidemiology , Sensitivity and Specificity , Interferons/analysis , Occupational Medicine/methods , Occupational Medicine/trends , False Positive Reactions , Mass Screening/methods , Algorithms , Health Personnel/statistics & numerical data
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