repeated subculturing

См. также в других словарях:

• Bacillus Calmette-Guérin — (or Bacille Calmette Guérin, BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis , that has lost its virulence in humans by being specially… …   Wikipedia