ABSTRACT
BACKGROUND: Occupational Tuberculosis (TB) can lead to work absenteeism and a negative professional impact. Knowing the reactivity of the tuberculin test and the risk of M. tuberculosis infection among healthcare professionals is essential for the revision and reinforcement of control measures against TB transmission. AIM: To assess the reactivity of tuberculin test and risk of M. tuberculosis infection among healthcare professionals working in an upright building, in which a TB Reference Clinic is placed. SUBJECTS AND METHODS: A tuberculosis Skin Test (TST) was done to 251 staff members of a TB clinic that did not have a previous history or suspicion of TB and that did not have a previous TST done. Among subjects with absence of reaction, repeated tests were carried out to assess booster reaction. RESULTS: Fifty one percent of studied subjects (129) had a positive tuberculin test. The booster phenomenon was evidenced in 35.7% (68/190). The seroconversion among non-reactive subjects, subjected to a new TST after one year, was 5.1%. The infection risk was 1.4. CONCLUSIONS: This study indicates an important occupational risk of infection in healthcare settings exposed to high TB incidence, and should be used to better allocate resources for infection control.
Subject(s)
Occupational Diseases/diagnosis , Tuberculin Test , Tuberculosis/diagnosis , Adolescent , Adult , Aged , Brazil , Cross-Sectional Studies , Female , Health Personnel , Humans , Incidence , Infection Control , Infectious Disease Transmission, Patient-to-Professional , Male , Middle Aged , Occupational Diseases/epidemiology , Occupational Diseases/prevention & control , Occupational Exposure , Prospective Studies , Risk Factors , Tuberculosis/epidemiology , Tuberculosis/prevention & control , Tuberculosis/transmission , Young AdultABSTRACT
Background: Occupational Tuberculosis (TB) can lead to work absenteeism and a negative professional impact. Knowing the reactivity of the tuberculin test and the risk of M. tuberculosis infection among healthcare professionals is essential for the revision and reinforcement of control measures against TB transmission. Aim: To assess the reactivity of tuberculin test and risk of M. tuberculosis infection among healthcare professionals working in an upright building, in which a TB Reference Clinic is placed. Subjects and Methods: A tuberculosis Skin Test (TST) was done to 251 staff members of a TB clinic that did not have a previous history or suspicion of TB and that did not have a previous TST done. Among subjects with absence of reaction, repeated tests were carried out to assess booster reaction. Results: Fifty one percent of studied subjects (129) had a positive tuberculin test. The booster phenomenon was evidenced in 35.7% (68/190). The seroconversion among non-reactive subjects, subjected to a new TST after one year, was 5.1%. The infection risk was 1.4. Conclusions: This study indicates an important occupational risk of infection in healthcare settings exposed to high TB incidence, and should be used to better allocate resources for infection control.
Antecedentes: La tuberculosis ocupacional causa ausentismo laboral. Conocer la reactividad tuberculínica de los trabajadores de la salud ayuda a mejorar las medidas de control para evitar la infección laboral con M. tuberculosis. Objetivo: Estudiar la reactividad tuberculínica de un grupo de trabajadores de la salud de un centro de referencia de tuberculosis que está ubicado en una edificación vertical. Material y Métodos: Se realizó una prueba de tuberculina a 251 empleados de una clínica de tuberculosis, que no tenían antecedentes o sospecha de tuberculosis y quienes no habían sido sometidos previamente a la prueba. Aquellos sujetos que no respondieron a tuberculina fueron sometidos a una nueva prueba para evaluar la reacción de refuerzo. Resultados: El 51% de los sujetos estudiados tuvieron una reacción tuber-culínica positiva. El fenómeno de refuerzo se observó en 69 de 190 sujetos (35,7%). La tasa de seroconversión en aquellos sujetos con una tuberculina negativa en que se repitió la prueba la cabo de un año, fue de 5,1%. Conclusiones: En este grupo de trabajadores de la salud expuestos a M. tuberculosis, hay una alta tasa de reactividad negativa a tuberculina.