The causal agent of bovine tuberculosis. Mycobacterium tuberculosis variant bovis BCG str. Pasteur 1173P2

Mycobacterium bovis strain BCG. This strain was used to produce BCG (Bacille de Calmette et Guan) vaccine, a well-known tuberculosis vaccine, originally developed by Calmette and Guan in the 1920's by multiple subculturings that resulted in attenuation (weakened virulence) of the strain. Mycobacterium bovis BCG str. Pasteur 1173P2. This organism was used to produce the antigen which was utilized for vaccine development.