Figure 1: Schematic of biological containment mechanisms.

A) Methods for addressing transfer and expression of genetic material in unintended hosts B) methods of preventing DNA from other bacteria being expressed in a transgenic strain C) methods for preventing the physical translocation of bacteria from their intended environment to an unintended environment, and D) methods for removing bacteria from their intended environment if they are no longer required. Physical forms of containment such as barriers and waste management are not included.