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Pathogenesis (TB)

"Pathogenesis of Tuberculosis in Mice Exposed to Low and High Doses of an Environmental Mycobacterial Saprophyte before Infection."

Published in TB and Outbreaks Week, September 29th, 1997

According to the authors' abstract of an article published in Infection and Immunity, "Mycobacteria are ubiquitous in the environment, but they are not part of the normal human microbial flora. It has been suggested that variable contact with mycobacteria can influence susceptibility to mycobacterial pathogens and the efficacy of subsequent Mycobacterium bovis BCG vaccination. To test this, mice were immunized with high or low doses of an environmental saprophyte, M. vaccae, that is intensely immunogenic as an autoclaved preparation. Two months later, they received an intratracheal challenge with M. tuberculosis H37Rv. Recipients of a low Th1-inducing dose (10(7)...

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