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Canadian Journal of Public Health = Revue Canadienne de Santé Publique logoLink to Canadian Journal of Public Health = Revue Canadienne de Santé Publique
. 1999 May 1;90(3):156–159. [Article in French] doi: 10.1007/BF03404497

Enquête épidémiologique sur un cas de tuberculose dans une grande entreprise manufacturière québécoise

Marie-Josée Drolet 13,✉, Réal Boisvert 13, Serge Déry 23, Denis Laliberté 33
PMCID: PMC6980003  PMID: 10401163

Abstract

Objectives: To determine the prevalence of tuberculosis infection related to a case of pulmonary and laryngeal tuberculosis in a workplace and to study PPD predictors.

Methods: The Mantoux skin test (PPD) was offered to all potentially infected contacts. Participants were asked to answer a questionnaire.

Results: Among 112 exposed employees, 92 (82.1%) were tested. At the 5 mm level, 65.2% of employees had positive tuberculin skin test (PPD). By controlling prior BCG and the degree of exposure, it showed a positive association between age and PPD (RC: 3.5; 95% CI: 1.25–10.03). When age and BCG were controlled, high exposure was statistically associated with PPD results (RC: 5.6; 95% CI: 1.25–24.68).

Conclusion: The observed prevalence rate is probably related to the fact that the index case was very infectious and had contact in an enclosed area over a long period of time before withdrawal from work.

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