ABSTRACT
In microbiology terminology, this change in the living mode of microorganisms, such as bacteria, is referred to as a change from planktonic free-drifting form to that of fixed-position sessile form. The uniqueness of this change is further manifested by the fact that bacteria previously existing as entities functioning entirely on their own in the planktonic state can, in the biofilm, interact with each other. Different individuals may assume different appearances and functions in the colony-type structure they created. In fact, it is possible to find different bacteria species in the same biofilm.
