| factors associated with tuberculin reactivity among the foreign-born in montreal. | because tuberculosis among the foreign-born is of increasing importance in north america, it has recently been recommended that newly arriving immigrants be tuberculin tested and preventive therapy given to all those with significant reactions. the factors affecting the prevalence of tuberculin reactions were assessed in a community-based tuberculin survey among foreign-born schoolchildren and young adults. of 1,198 foreign-born who were tuberculin tested, 32.4% had significant tuberculin reacti ... | 1992 | 1519858 |
| genetic structure of mycobacterium avium subsp. paratuberculosis population in cattle herds in quebec as revealed by using a combination of multilocus genomic analyses. | mycobacterium avium subsp. paratuberculosis is the etiological agent of paratuberculosis, a granulomatous enteritis affecting a wide range of domestic and wild ruminants worldwide. a variety of molecular typing tools are used to distinguish m. avium subsp. paratuberculosis strains, contributing to a better understanding of m. avium subsp. paratuberculosis epidemiology. in the present study, pcr-based typing methods, including mycobacterial interspersed repetitive units/variable-number tandem rep ... | 2014 | 24829229 |
| production effects of pathogens causing bovine leukosis, bovine viral diarrhea, paratuberculosis, and neosporosis. | the primary purpose of this research was to determine associations among seropositivity for bovine leukemia virus (blv), bovine viral diarrhea virus (bvdv), mycobacterium avium ssp. paratuberculosis (map), and neospora caninum (nc) and each of 3 outcome variables (305-d milk, fat, and protein production) in canadian dairy cattle. serum samples from up to 30 randomly selected cows from 342 herds on monthly milk testing were tested for antibodies against blv (idexx elisa; idexx corporation, westbr ... | 2007 | 17235141 |
| nontuberculous mycobacteria in children: a changing pattern. | nontuberculous mycobacteria (ntm) infections seem to be increasing in numbers and in severity in developed countries worldwide. | 2005 | 16089239 |
| 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 ... | 1997 | 9412575 |