Abstract
Objective: To determine the prevalence of positive tuberculin skin test (TST) reactions (10 mm or greater) among full-time employees of a provincial prison for women in Montreal.
Methods: Participants underwent tuberculin skin testing and completed a self-administered questionnaire.
Results: Among 129 employees identified, 118 (91%) underwent tuberculin testing. Among 102 born in Quebec who completed the questionnaire, 33 (32%) had positive TST reactions, including 12 (23%) of 52 subjects who had never been vaccinated. Positive TST reactions were significantly associated in multivariate analysis with BCG vaccination after infancy (OR = 4.5, 95% CI = 1.5–13.5), years of work at other provincial prisons (OR = 2.5 for each 5 years of work, 95% CI = 1.2–5.2), travel to tuberculosis endemic countries (OR = 7.7, 95% CI = 1.4–43), although not with work in the prison for women (OR = 1.3, 95% CI = 0.9–1.9)
Conclusion: The prevalence of positive TST reactions was greater among workers at a provincial prison for women than among a sample of students, suggesting increased occupational risk of tuberculosis infection.
Résumé
Objectif: Déterminer la prévalence des cuti-réactions positives à la tuberculine (10 mm ou plus) parmi les employés à temps plein d’une prison provinciale pour les femmes à Montréal.
Méthodologie: Les participants ont passé un test cutané à la tuberculine et ont répondu eux-mêmes à un questionnaire.
Résultats: Sur 129 employés identifiés, 118 (91%) ont subi un test cutané à la tuberculine. Sur les 102 d’entre eux nés au Québec qui ont rempli le questionnaire, 33 (32%) ont eu une cuti-réaction positive, dont 12 parmi les 52 individus qui n’avaient jamais été vaccinés. Dans l’analyse multivariable, les cuti-réactions positives sont apparues nettement associées à la vaccination au BCG après l’enfance (risque relatif [RR] = 4.5, 95% intervalle de confiance [IC] = 1.5–13.5), à des années de travail dans d’autres prisons provinciales (RR = 2.5 pour 5 années de travail, 95% IC = 1.2–5.2), à des voyages dans des pays où la tuberculose est endémique (RR = 7.7, 95% IC = 1.4–43), mais pas avec le travail dans la prison pour femmes (RR = 1.3, 95% IC = 0.9–1.9).
Conclusions: La prévalence des cuti-réactions positives est plus importante parmi les employés d’une prison provinciale pour femmes que parmi un échantillon d’étudiants, ce qui tend à indiquer une augmentation du risque professionnel de contraction de la tuberculose.
Footnotes
(on leave from the Infectious Disease Unit, Direction de la santé publique de Montréal-Centre)
Dr. Menzies is supported by a scholarship of the Fonds de la Recherche en Santé du Québec.
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