impact of immigration on tuberculosis infection among canadian-born schoolchildren and young adults in montreal.we conducted a cross-sectional tuberculin survey among non-bcg-vaccinated canadian-born schoolchildren in grades 6 and 10, health professional students, and young adult workers, to estimate the association of tuberculin reactions with indices of contact with tuberculosis. participants underwent simultaneous tuberculin testing with ppd-t (standard) and ppd-b (from m. intracellulare). exposure was estimated from questionnaire responses, group, aggregate census, and tuberculosis incidence data. of ...19979412575
nontuberculous mycobacteria in children: a changing pattern.nontuberculous mycobacteria (ntm) infections seem to be increasing in numbers and in severity in developed countries worldwide.200516089239
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